3L英语第四册lesson53

[ti:] [ar:] [al:] [by:] [00:02.00]喜欢tingclass.net，就把tingclass.net复制到QQ个人资料中！Lesson 53 [00:03.59]第53课 [00:05.19]Television Day:Penicillin [00:07.81]电视日:青霉素 [00:10.44]If you leave a piece of bread in a warm damp place mould will soon grow on it. [00:14.26]如果你把一片面包放在温暖潮湿的地方,上面很快会长上霉菌. [00:18.09]When this happens,we say that bread "has gone mouldy". [00:20.77]这种情况发生时我们说那面包"发霉"了. [00:23.45]Mould can grow on all kinds of things besides food-- [00:26.18]除食品以外,所有东西上也都会长霉菌-- [00:28.91]on leather,clothing,even on wood. [00:31.48]皮革、衣服,乃至木头. [00:34.05]It grows from tiny spores which are in the air. [00:36.64]它是从空气中的微孢里长出来的. [00:39.22]Each spore is like a little mushroom. [00:41.39]每个孢就像个小蘑菇. [00:43.56]If the conditions are right, [00:45.25]如果条件适宜, [00:46.93]a single spore can quickly spread and form a mould. [00:49.56]一个孢就能很快长成一个霉菌. [00:52.18]It is extremely common and we have all noticed it. [00:55.05]这是极寻常的事,我们都见过. [00:57.93]In 1928,Sir Alexander Fleming found that [01:00.85]1928年,亚历山大.弗莱明爵士发现 [01:03.78]mould had killed some germs he was trying to grow in his laboratory [01:06.76]霉菌杀死了他在实验室培植的某些细菌. [01:09.74]If he had not noticed this [01:11.56]如果他没有发现这一现象的话, [01:13.39]the world would have lost one of the greatest discoveries of the century. [01:16.27]世界就失去了本世纪内最伟大的发现之一. [01:19.14]Fleming called the substance "penicillin" [01:21.31]弗莱明把这一物质叫做"青霉素". [01:23.48]Because penicillin can kill germs,doctors use it to treat diseases. [01:27.05]青霉素能杀菌,所以医生用它治病. [01:30.63]It has saved millions of lives. [01:32.61]它拯救了几百万人的生命 [01:34.58]Scientists grow enormous quantities of common mould [01:37.41]科学家培植大量的普通霉菌 [01:40.25]so that they can get penicillin from it in order to make antibiotics, [01:43.37]从中提取青霉素生产出抗生素, [01:46.49]that is,substances that kill germs. [01:49.02]即杀菌物质. [01:51.56]Next time you see some mould on a piece of bread, [01:53.88]下次你要是看见面包上的霉菌, [01:56.21]remember that it is one of man's greatest friends! [01:58.73]记住它可是人类最好的朋友之一呢!

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