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新概念英语第四册第7课:Bats

时间：2025年06月10日

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以下是小编精心整理的新概念英语第四册第7课:Bats，本文共5篇，供大家阅读参考。本文原稿由网友“sz不凡”提供。

篇1：新概念英语第四册第7课:Bats

Lesson 7 Bats蝙蝠

First listen and then answer the following question.

听录音，然后回答以下问题。

In what way does echo-location in bats play an utilitarian role?

Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.

动物发出的声音不都是用作语言交际。我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。

To get a full appreciation of what this means we must turn first to some recent human inventions. Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back. The further off this solid obstruction, the longer time will elapse for the return of the echo. A sound made by tapping on the hull of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated. So was born the echo-sounding apparatus, now in general use in ships. Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish. With experience, and with improved apparatus, it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.

要透彻理解这句话的意义，我们应先回顾一下人类最近的几项发明。大家都知道，在墙壁或山腰附近发出的喊声，就会听到回声。固体障碍物越远。回声返回所用时间就越长。敲打船体所发了的声音会从海底传回来，测出回声间隔的时间，便可算出该处海洋的深度。这样就产生了目前各种船舶上普遍应用的回声探测仪。任何固体者反射声音，反射的声音因物体的大小和性质的不同而不同。鱼群也反射声音。从测定海深到测定鱼群，这一进展比较容易。根据经验和改进了的仪器，不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。

It has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steer clear of obstacles -- or locate flying insects on which they feed. This echo-location in bats is often compared with radar, the principle of which is similar.

人们发现，某些蝙蝠能发出尖叫声，并能通过回声来确定并躲开障碍物，或找到它们赖以为生的昆虫。蝙蝠这种回声定位常常可与雷达相比较，其原理是相似的。

New words and expressions生词和短语

bat

n. 蝙蝠

strictly

adv. 明确地

utilitarian

adj.实用的

appreciation

n. 理解

elapse

v. 障碍物

hull

n. 消逝

interval

n. 船体

receipt

n. 间隔

apparatus

n. 收到

shoal

n. 仪器

herring

n. 鱼群

cod

n. 鳕鱼

squeak

n. 尖叫声

Notes on the text课文注释

1 Not all sounds made by animals serve as language,动物发出的声音不全是作语言交流。此句采用了部分否定，既不是否定所有的动物，而只是一部分。serve as,作...之用。

2 turn to,求助于。

3 play a role in,在...方面起作用。

4 in the vicinity of,在...的附近。

5 So was born the echo-sounding appararus,就这样诞生了回声探测仪。这是一个倒装句，主要是为了避免因主语过长而使全句失去平衡，同时也为了使apparatus的定语now in general use in ships紧挨着名词。in general use,普遍使用。

6 steer clear of,避开。

Lesson 7 课后练习和答案Exercises and Answer

篇2：新概念英语第四册第27课:The ‘Vasa’

Lesson 27 The 'Vasa'“瓦萨”号

First listen and then answer the following question.

听录音，然后回答以下问题。

What happened to the 'Vasa' almost immediately after she was launched?

From the seventeenth-century empire of Sweden, the story of a galleon that sank at the start of her maiden voyage in 1628 must be one of the strangest tales of the sea. For nearly three and a half centuries she lay at the bottom of Stockholm harbour until her discovery in 1956. This was the Vasa, royal flagship of the great imperial fleet.

1628年，一艘大帆船在处女航时就沉没了，这个从容不迫7世纪瑞典帝国流传至今的故事无疑是航海史上最离奇的事件之一。这艘大船在斯德哥尔摩港口的海底躺了将近几年来个世纪之后，直到1956年才被发现。这就是“瓦萨”号，帝国大舰的皇家旗舰。

King Gustavus Adolphus, 'The Northern Hurricane', then at the height of his military success in the Thirty Years' War, had dictated her measurements and armament. Triple gun-decks mounted sixty-four bronze cannon. She was intended to play a leading role in the growing might of Sweden.

当时号称“北方飓风”的国王古斯夫斯.阿道尔弗正处在“三十年战争”的军事鼎盛阶段，他亲自规定了这艘船的规模和武器配备。3层的火炮甲板上装着眼点4门青铜加农炮，目的就是要在不断增长的瑞典势力中起主导作用。

As she was prepared of her maiden voyage on August 10, 1628, Stockholm was in a ferment. From the Skeppsbron and surrounding islands the people watched this thing of beauty begin to spread her sails and catch the wind. They had laboured for three years to produce this floating work of art; she was more richly carved and ornamented than any previous ship. The high stern castle was a riot of carved gods, demons, knights, kings, warriors, mermaids, cherubs; and zoomorphic animal shapes ablaze with rea and gold and blue, symbols of courage, power, and cruelty, were portrayed to stir the imaginations of the superstitious sailors of the day.

1628年8月10日，“瓦萨”号准备首航时，斯德哥尔摩一片欢腾。人们从斯开波斯布朗和周围的岛屿前来观着这艘美丽的战船扬帆起航，乘风前进。瑞典人辛辛苦苦干了3年才建成这件水上艺术品，它比以往任何船只雕刻得都更加精美，装饰得都更加华丽。高耸的船楼上雕刻了令人眼花缭乱的神仙、妖魔、骑士、国王、武士、美人鱼和小天使，还有用红色、金黄色、蓝色绘制的光彩夺目的兽形图案，象征着勇敢、力量和残暴，以激起汉时崇尚迷信的水手们的想像。

Then the cannons of the anchored warships thundered a salute to which the Vasa fired in reply. As the emerged from her drifting cloud of gun smoke with the water churned to foam beneath her bow, her flags colour, she presented a more majestic spectacle than Stockholmers had ever seen before. All gun-ports were open and the muzzles peeped wickedly from them.

这时，停泊在港口的其他战船向“瓦萨”号鸣炮致礼，“瓦萨”号也鸣炮回礼。当“瓦萨”号从弥漫的礼炮烟云中出现时，船头下浪花加溅，舰旗迎风招展，三角旗随风飘动，微风鼓起风帆，金碧辉煌的船楼闪耀着灿烂的色彩。“瓦萨”号展现的壮观景象是斯德哥尔摩人从未见过的。船上的炮眼开着，炮口虎视眈眈地向外窥视着。

As the wind freshened there came a sudden squall and the ship made a strange movement, listing to port. The Ordnance Officer ordered all the port cannon to be heaved to starboard to counteract the list, but the steepening angle of the decks increased. Then the sound of rumbling thunder reached the watchers on the shore, as cargo, ballast, ammunition and 400 people went sliding and crashing down to the port side of the steeply listing ship. The lower gun-ports were now below water and the inrush sealed the ship's fate. In that first glorious hour, the mighty Vasa, which was intended to rule the Baltic, sank with all flags flying-in the harbour of her birth.

当风力增强时，突然刮来一阵大风，“瓦萨”号奇怪地摇晃了一下，便向左舷倾斜。炮长命令把左舷上所有大炮搬到右舷上来以抵消船的倾斜，但甲板的倾斜度仍在增加。当物口、压舱物、弹药和400个人轰地一声滑向陡斜的左舷时，岸上的观众听到了雷鸣般的轰响。下层炮眼已淹没在水里，涌进船舱的水给“瓦萨”号带来了难以逃脱的厄运。就这样，想要统治波罗的海的大型战舰“瓦萨”号，在它壮丽的起航时刻，带着全身飘扬的彩旗，沉没在了它诞生的港口。

New words and expressions 生词和短语

galleon

n. 大型帆船

Stockholm

n. 斯德哥尔摩

flagship

n. 旗舰

imperial

adj. 帝国的

hurricane

n. 飓风

armament

n. 军械

triple

adj. 三层的

mount

v. 架有

bronze

n. 青铜

cannon

n. 加农炮

might

n.力量

ferment

n.激动不安

ornament

v.装饰

riot

n.丰富

demon

n.恶魔

mermaid

n.美人鱼

cherub

n.小人使

zoomorphic

adj.兽形的

ablaze

adj.光彩的

portray

v.绘制

drifting

adj.弥漫的

churn

v.翻滚

pennant

n.三角旗

superstructure

n.上部结构

majestic

adj.威严的

muzzle

n.炮口

freshen

v.变强

squall

n.狂风

list

v.倾斜

port

n.(船、飞机的)左舷

ordnance

n.军械

heave

v.拖

starboard

n.(船、飞机的)右舷

counteract

v.抵消

steepen

v.变得更陡峭

ballast

n.压舱物

inrush

n.水的涌入

Baltic

n.波罗的海

Notes on the text课文注释

1 the 'Vasa', “瓦萨号”战船。这艘船是以瑞典瓦萨王朝（1523-1654）创始人Gustavus Vasa的姓氏命名的。Gustavus Vasa（1496-1560）曾领导了发对丹麦统治的暴动，1523年出任国王，使瑞典成了一个独立、统一、富强的国家。

2 the Thirty Years War“三十年战争”。这是欧洲历史上的一场多国混战，具有政治和宗教色彩，是新教诸侯和天主教诸侯之间的连年战争（1618-1648），最后在1648年签定了威斯特伐利亚条约，以天主教诸侯失败而告终。

3 a riot of,许多...，主要指色彩丰富。

4 with the water churned...，her flags flying , pennans waving , sails filling...， and the red and gold ... ablaze... with最后5个独立主格结构，均作方式状语，修饰动词emerged。

Lesson 27 课后练习和答案Exercises and Answer

篇3：新概念英语第四册第47课:The great escape

Lesson 47 The great escape大逃亡

First listen and then answer the following quesion.

听录音，然后回答以下问题。

What is one of the features of modern camping where nationality is concerned?

Economy is one powerful motive for camping, since after the initial outlay upon equipment, or through hiring it, the total expense can be far less than the cost of hotels. But, contrary to a popular assumption, it is far from being the only one, or even the greatest. The man who manoeuvres carelessly into his twenty pounds' worth of space at one of Europe's myriad permanent sites may find himself bumping a Bentley. More likely, Ford Escort will be hub to hub with Renault or Mercedes, but rarely with bicycles made for two.

图省钱是露营的一个主要动机，因为除了开始时购置或是租借一套露营装备外，总费用算起来要比住旅馆开支少得多。但是，和一般的看法相反，这决非是仅有的，甚至不是最主要的动机。如果一位游客漫不经心地驾车驶入欧洲无数常年营地之一，花20镑租用一个空位，那么他可能会碰见一辆本特利汽车，更可能会望见一辆福特.康索尔或一辆雷诺或一辆梅塞迪斯并排停放着，不过双人自行车则不容易看到。

That the equipment of modern camping becomes yearly more sophisticated is an entertaining paradox for the cynic, a brighter promise for the hopeful traveler who has sworn to get away from it all. It also provides-and some student sociologist might care to base his thesis upon the phenomenon -- an escape of another kind. The modern traveller is often a man who dislikes the Splendide and the Bellavista, not because he cannot afford, or shuns their material comforts. but because he is afford of them. Affluent he may be, but he is by no means sure what to tip the doorman or the chambermaid. Master in his own house, he has little idea of when to say boo to a maitre d'hotel.

现代露营装备一年比一年讲究，这对那些厌世嫉俗者来说是一件有趣的自相矛盾的事情。而对于发誓用露营来摆脱烦恼的人来说，却带来了更光明的前景。学社会学的大学生来露营是另一种形式的摆脱现实，他们的目的很可能是根据观察到的露营现象去写论文。现代露营旅游的人往往讨厌在“斯普兰迪德”和“贝拉维斯塔”这样的大酒店，这并不是因为他们付不起钱，也不是为了躲避物质享受，而是因为他们害怕酒店。他们可能很富有，但给看门人和房间女服务叫多少小费，心中却根本没有数；他们在家可能是主人，但不知道什么时候才能对酒店的经理表示不满。

From all such fears camping releases him. Granted, a snobbery of camping itself, based upon equipment and techniques, already exists; but it is of a kind that, if he meets it, he can readily understand and deal with. There is no superior 'they' in the shape of managements and hotel hierarchies to darken his holiday days.

露营便人们免除了这些忧虑。诚然，露营地本身也存在以露营装备和方式取人的势利现象，但如果有这种情况，露营者也容易理解，知道如何对付，但在露营地里根本不会有管人的“人上人”和酒店里的等级制度来种露营者的假日过得阴郁低沉。

To such motives, yet another must be added. The contemporary phenomenon of car worship is to be explained not least by the sense of independence and freedom that ownership entails. To this pleasure camping gives an exquisite refinement.

除上以动机外，还应加上一个。当前崇拜汽车现象可以用与所有权相伴的独立和自由意识来解释。因此开车去露营会给这种快乐意识增加一种优雅意境。

From one's own front door to home or foreign hills or sands and back again, everything is to hand. Not only are the means of arriving at the holiday paradise entirely within one's own command and keeping, but the means of escape from holiday hel (if the beach proves too crowded, the local weather too inclement) are there, outside -- or, as likely, part of -- the tent.

从自己的家门出发到国内国外的山区或沙滩上露营然后返回，一切都很便利。完全在自己掌握之中的私人汽车不仅是到达假日天堂的工具，而且也是逃离假日地狱（如海滩太挤，当地天气恶劣）方便工具，因为汽车就停在帐篷外面，或者汽车本身可能就是露营帐篷的一个组成部分。

Idealists have objected to the package tour, that the traveller abroad thereby denies himself the opportunity of getting to know the people of the country visited. Insularity and self-containment, it is argued, go hand in hand. The opinion does not survive experience of a popular Continental camping place. Holiday hotels tend to cater for one nationality of visitors especially, sometimes exclusively. Camping sites, by contrast, are highly cosmopolitan. Granted, a preponderance of Germans is a characteristic that seems common to most Mediterranean sites; but as yet there is no overwhelmingly specialized patronage. Notices forbidding the open-air drying of clothes, or the use of water points for car washing, or those inviting 'our camping friends' to a dance or a boat trip are printed not only in French or Italian or Spanish, but also in English, German and Dutch. At meal times the odour of sauerkraut vies with that of garlic. The Frenchman's breakfast coffee competes with the Englishman's bacon and eggs.

理想主义者像反对旅行社安排一切的一揽子旅游一样反对露营的作法，说这种封闭的作法使到国外旅游者失去了了解所去国家人民的机会。他们争论说，心胸狭窄和自我封闭是并存的。但这种说法在受人欢迎的欧洲露营地是站不住脚的。假日旅馆有只接待来自一个国家的旅游者的倾向，有时会达到排他的程度。而露营驻地则相反，是高度世界性的。在大多数地中海露营地里，德国人占优势似乎是个普遍现象，确实如此，但并没有特别的优待。禁止露天晒衣服、禁止用水龙头冲洗汽车的布告和邀请露营朋友参加舞会、乘船观光的招贴不仅印志法语、意大利语、西班牙语，而且也印成英语、德语、荷兰语。用饭的时候，德国泡菜味和大蒜味争相散发，法国人的早点咖啡和英国人的咸肉煎蛋竞相比美。

Whether the remarkable growth of organized camping means the eventual death of the more independent kind is hard to say. Municipalities naturally want to secure the campers' site fees and other custom. Police are wary of itinerants who cannot be traced to a recognized camp boundary or to four walls. But most probably it will all depend upon campers themselves: how many heath fires they cause; how much litter they leave; in short, whether or not they wholly alienate landowners and those who live in the countryside. Only good scouting is likely to preserve the freedoms so dear to the heart of the eternal Boy Scout.

有组织的露营活动的明显发展是否意味着较独立的自我封闭式露营的最终消失，还很难说。市政当局当然希望获得露营者的场地费和其他光临的好处，警察则对那些查不出有固定营地或住处的游荡者保持警惕。但最重要的或许是露营者自己，即他们引起了多少场野火，留下了多少垃圾。总之，他们是否弄得土地的主人和乡间的居民同他们反目。只有优良的童子军活动才能保持不朽的童子军所衷心热爱的各项自由。

New words and expressions 生词和短语

assumption

n. 假定

manoeuvre

v. （驱车）移动

myriad

adj. 无数的

paradox

n. 自相矛盾的呈

cynic

n. 愤世嫉俗者

sociologist

n. 社会学家

shun

v. 避开

affluent

adj. 富有的

chambermaid

n. 女招待员

boo

b. 呸的一声

maitre d'hotel

n. [法语]总管

snobbery

n. 势利

hierarchy

n. 等级制度

entail

v. 便成为必要

inclement

adj. 险恶的

package tour

由旅行社安排一切的一揽子诱游

insularity

n. 偏狭

cater

v. 迎合

exclusively

adv. 排他地

cosmopolitan

adj. 世界的

preponderance

n. 优势

overwhelmingly

adv. 以压倒优势地，清一色地

patronage

n. 恩惠，惠顾

sauerkraut

n. 泡菜

vie

v. 竞争

municipality

n. 市政当局

itinerant

n. 巡回者

heath

v. 荒地

alienate

v. 便疏远

eternal

adj. 永久的

Notes on the text课文注释

1 it is far from...,远不是……。

2 twenty pounds' worth of space，价值20磅的空地，其中worth是名词。

3 hub to hub with，车轴与……车轴相接。

4 the Splendide and the Bellavista，两大酒店的名字。

5 say boo to a maitre d'hotel，对酒店的经理表示不满。say boo to a maitre d'hotel，是从not say boo to a goose(非常胆小，不敢得罪)演变而来的。在这个成语中，a goose 常被人们幽默地换成其他字眼。

6 Granted,...but...（虽然……但是……）这种句型中的Granted总放在句首，意思是Yes,相当于一个连接副词的作用。

7 in the shape of,以……形式出现的。

8 be to hand，垂手可得。

9 cater for，迎合……。

10 be wary of，提放……。

11 Boy Scout，童子军。

Lesson 47 课后练习和答案Exercises and Answer

篇4：新概念英语第四册第37课:The process of ageing

Lesson 37 The process of ageing衰老过程

First listen and then answer the following question.

听录音，然后回答以下问题。

What is one of the most unpleasant discoveries we make about ourselves as we get older?

At the age of twelve years, the human body is at its most vigorous. It has yet to reach its full size and strength, and its owner his or her full intelligence; but at this age the likelihood of death is least. Earlier, we were infants and young children, and consequently more vulnerable; later, we shall undergo a progressive loss of our vigour and resistance which, though imperceptible at first, will finally become so steep that we can live no longer, however well we look after ourselves, and however well society, and our doctors, look after us. This decline in vigour with the passing of time is called ageing. It is one of the most unpleasant discoveries which we all make that we must decline in this way, that if we escape wars, accidents and disease we shall eventually 'die of old age', and that this happens at a rate which differs little from person to person, so that there are heavy odds in favour of our dying between the ages of sixty-five and eighty. Some of us will die sooner, a few will live longer -- on into a ninth or tenth decade. But the chances are against it, and there is a virtual limit on how long we can hope to remain alive, however lucky and robust we are.

人体在12岁时是生命力最旺盛的时期。虽然这个时期人的身材、体力和智力还有待发展和完善，但在这个年龄死亡的可能性最小。再早一些，我们是幼儿和小孩子，身体较脆弱；再迟一些，我们就要经历生命力和抵抗力逐步衰退的过程。虽然这个过程起初难以觉察，但最终会急转直下，不管我们怎样精心照料我们自己，不管社会和医生怎样对我们进行精心照顾，我们也无法再活下去了。生命力随着时间的流失而衰退叫做衰老。人类发现的最不愉快的一个事实是：人必然会衰老。既使我们能避开战争、意外的事故和各种疾病，我们最终也会“老死”；衰老的速度在人与人之间相差甚微，我们最可能死亡的年龄在65至80岁之间，有些人会死得早一些，少数人寿命会长一些 -- 活到八十几岁或九十几岁，但这种可能性很小。不管我们多么幸运，多么健壮，我们所希望的长寿实际上是有限度的。

Normal people tend to forget this process unless and until they are reminded of it. We are so familiar with the fact that man ages, that people have for years assumed that the process of losing vigour with time, of becoming more likely to die the older we get, was something self-evident, like the cooling of a hot kettle or the wearing-out of a pair of shoes. They have also assumed that all animals, and probably other organisms such as trees, or even the universe itself, must in the nature of things 'wear out'. Most animals we commonly observe do in fact age as we do, if given the chance to live long enough; and mechanical systems like a wound watch, or the sun, do in fact run out of energy in accordance with the second law of thermodynamics (whether the whole universe does so is a moot point at present). But these are not analogous to what happens when man ages. A run-down watch is still a watch and can be rewound. An old watch, by contrast, becomes so worn and unreliable that it eventually is not worth mending. But a watch could never repair itself -- it does not consist of living parts, only of metal, which wears away by friction. We could, at one time, repair ourselves --well enough, at least, to overcome all but the most instantly fatal illnesses and accidents. Between twelve and eighty years we gradually lose this power; an illness which at twelve would knock us over, at eighty can knock us out, and another 700 for the survivors to be reduced by half again.

衰老的过程，不经提起，正常人容易忘记；一经提醒，才会记起。我们对人总是要衰老的现象并不陌生，多年来就已认识到。生命随着时间流失而丧失活力，人随着年龄的增长而接近死亡，这是不言而喻的，就像一壶热水迟早会凉不来，一双鞋渐渐会磨破一样。人们不但认识到所有的动物，大概也认识到所有的有机物。如树木，甚至宇宙本身，从事物的本质上来说都会“磨损掉”。我们通常看到的大多数动物，即使能让它们活得足够长久的话，也会像我们一样衰老的。像上紧发条的手表那样的机械装置，或太阳，也都会消耗完其能量（整个宇宙否如此，目前沿有争论）。不过，这些衰老的情况同人并不相似。手表停了依然是只手表，还可以重上好发条。然而一只老掉牙的手表，磨损太厉害，老得一点儿不准了，最终不值得修理了。但是，手表决不会自行修理，它不是由有生命的部件组成，而是由金属组成，而金属可以随着磨擦而磨损殆尽。而我们人，在一定时间内是可以自行修复的，除了暴病死或意外事故外，至少足以克服一切疾病和事故。在12岁至80岁之间，我们逐渐丧失这种能力。能使我们在12岁时病倒的疾病，到了80岁可能会使我们一厥不振而进入坟墓。假如我们能保持12岁时的旺盛生命力，那么我们当中的一半人过7才会死去，剩下的一半人再过700年，才会又减少一半。

New words and expressions 生词和短语

likelihood

n. 可能性

infant

n. 婴儿

vulnerable

adj. 脆弱

imperceptible

adj. 感觉不到的

steep

adj. 急转直下

ageing

n. 老化

odds

n. 可能性

virtual

adj. 实际上的

robust

adj. 强健的

organism

n. 有机体

thermodynamics

n. 热力学

moot

adj. 争论未决的

run-down

adj. 破旧的

friction

n. 摩擦

Notes on the text课文注释

1 at its most vigorous, 生命力最旺盛的时候。

2 with the passing of time, 随着时间的流失。

3 It is one of the most unpleasant discoveries ... that...,that...,and that... ，3个以that引导的从句是discoveries 的同位语。

4 a wound watch,上紧了发条的表。

Lesson 37 课后练习和答案Exercises and Answer

篇5：新概念英语第四册第17课:A man-made disease

Lesson 17 A man-made disease人为的疾病

First listen and then answer the following question.

听录音，然后回答以下问题。

What factor helped to spread the disease of myxomatosis?

In the early days of the settlement of Australia, enterprising settlers unwisely introduced the European rabbit. This rabbit had no natural enemies in the Antipodes, so that it multiplied with that promiscuous abandon characteristic of rabbits. It overran a whole continent. It caused devastation by burrowing and by devouring the herbage which might have maintained millions of sheep and cattle. Scientists discovered that this particular variety of rabbit (and apparently no other animal) was susceptible to a fatal virus disease, myxomatosis. By infecting animals and letting them loose in the burrows, local epidemics of this disease could be created. Later it was found that there was a type of mosquito which acted as the carrier of this disease and passed it on to the rabbits. So while the rest of the world was trying to get rid of mosquitoes, Australia was encouraging this one. It effectively spread the disease all over the continent and drastically reduced the rabbit population. It later became apparent that rabbits were developing a degree of resistance to this disease, so that the rabbit population was unlikely to be completely exterminated. There were hopes, however, that the problem of the rabbit would become manageable.

在澳大利亚移民初期，一些有创业精神的移民不明智地把欧洲兔子引进了澳大利亚。这种兔子在澳大利亚及新西兰没有天敌，因此便以兔子所特有的杂乱交配迅猛繁殖起来。整个澳洲兔子成灾。它们在地下打洞，吃掉本可以饲养数百万头牛羊的牧草，给澳洲大陆造成了毁灭性的破坏。科学家们发现，这种特殊品种的兔子（显然不包括别的动物）易患一种叫“多发性粘液瘤”的致命毒性疾病。通过让染上此病的动物在洞内乱跑，就可以使这种疾病在一个地区蔓延起来。后来又发现，有一种蚊子是传播这种疾病的媒介，能把此病传染给兔子。因此，世界上其他地方在设法消灭蚊子的时候，澳大利亚却在促使这种蚊子大量繁殖。蚊子把这种疾病扩散到整个澳洲大陆，效果甚佳，结果兔子的数目在为减少。后来，明显看出，兔子对这种疾病已产生了一定程度的免疫力，所以兔子不可能被完全消灭。但是，已有希望解决兔子所带来的问题。

Ironically, Europe, which had bequeathed the rabbit as a pest to Australia, acquired this man-made disease as a pestilence. A French physician decided to get rid of the wild rabbits on his own estate and introduced myxomatosis. It did not, however, remain within the confines of his estate. It spread through France, Where wild rabbits are not generally regarded as a pest but as sport and a useful food supply, and it spread to Britain where wild rabbits are regarded as a pest but where domesticated rabbits, equally susceptible to the disease, are the basis of a profitable fur industry. The question became one of whether Man could control the disease he had invented.

具有讽刺意味的是，欧洲把这种兔子作为有害动物传给澳洲，而欧洲自己却染上了这种人为的瘟疫般的疾病。一位法国内科医生决定除掉自己庄园内的野兔子，于是引进了这种多发性粘液瘤疾病。然而，这种疾病并未被局限在他的庄园内，结果在整个法国蔓延开来。野兔在法国一般不被当作有害动物，而被视为打猎取乐的玩物和有用的食物来源。这种疾病又蔓延到了英国。在英国，野兔被当作有害的动物，可是家兔是赚钱的毛皮工业的基础，然而家兔同样易感染这种疾病。现在的问题是，人类能否控制住这种人为的疾病。

New words and expressions 生词和短语

settlement

n. 新拓居地

enterprising

adj. 有事业心的

settler

n. 移居者

Antipodes

n. 新西兰和澳大利亚（英）

promiscuous

adj. 杂乱的

abandon