[by:英语听力网|http://yingyu.chazidian.com||查字典英语网] [00:00.00]喜欢chazidian.com，就把chazidian.com复制到QQ个人资料中！Lesson 53 [00:01.59]第53课 [00:03.19]Television Day:Penicillin [00:05.81]电视日:青霉素 [00:08.44]If you leave a piece of bread in a warm damp place mould will soon grow on it. [00:12.26]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. [00:16.09]When this happens,we say that bread "has gone mouldy". [00:18.77]这种情况发生时我们说那面包"发霉"了. [00:21.45]Mould can grow on all kinds of things besides food-- [00:24.18]除食品以外,所有东西上也都会长霉菌-- [00:26.91]on leather,clothing,even on wood. [00:29.48]皮革、衣服,乃至木头. [00:32.05]It grows from tiny spores which are in the air. [00:34.64]它是从空气中的微孢里长出来的. [00:37.22]Each spore is like a little mushroom. [00:39.39]每个孢就像个小蘑菇. [00:41.56]If the conditions are right, [00:43.25]如果条件适宜, [00:44.93]a single spore can quickly spread and form a mould. [00:47.56]一个孢就能很快长成一个霉菌. [00:50.18]It is extremely common and we have all noticed it. [00:53.05]这是极寻常的事,我们都见过. [00:55.93]In 1928,Sir Alexander Fleming found that [00:58.85]1928年,亚历山大.弗莱明爵士发现 [01:01.78]mould had killed some germs he was trying to grow in his laboratory [01:04.76]霉菌杀死了他在实验室培植的某些细菌. [01:07.74]If he had not noticed this [01:09.56]如果他没有发现这一现象的话, [01:11.39]the world would have lost one of the greatest discoveries of the century. [01:14.27]世界就失去了本世纪内最伟大的发现之一. [01:17.14]Fleming called the substance "penicillin" [01:19.31]弗莱明把这一物质叫做"青霉素". [01:21.48]Because penicillin can kill germs,doctors use it to treat diseases. [01:25.05]青霉素能杀菌,所以医生用它治病. [01:28.63]It has saved millions of lives. [01:30.61]它拯救了几百万人的生命 [01:32.58]Scientists grow enormous quantities of common mould [01:35.41]科学家培植大量的普通霉菌 [01:38.25]so that they can get penicillin from it in order to make antibiotics, [01:41.37]从中提取青霉素生产出抗生素, [01:44.49]that is,substances that kill germs. [01:47.02]即杀菌物质. [01:49.56]Next time you see some mould on a piece of bread, [01:51.88]下次你要是看见面包上的霉菌, [01:54.21]remember that it is one of man's greatest friends! [01:56.73]记住它可是人类最好的朋友之一呢!