[00:00.00]喜欢chazidian.com,就把chazidian.com复制到QQ个人资料中!Lesson 26 The past life of the earth
[00:02.99]地球上的昔日生命
[00:05.98]First listen and then answer the following question.
[00:08.32]听录音,然后回答以下问题.
[00:10.66]What is the main condition
[00:14.21]for the preservation of the remains of any living creature?
[00:16.78]生物的尸体被保存下来的主要条件是什么?
[00:19.36]It is animals and plants which lived in or near water
[00:22.24]只有生活在水中或水边的动植物
[00:25.13]whose remains are most likely to be preserved,
[00:27.35]其尸体最有可能被保存下来,
[00:29.57]for one of the necessary conditions of preservation is quick burial,
[00:32.90]因保存的必要条件之一是迅速掩埋,
[00:36.23]and it is only in the seas and rivers,and sometimes lakes,
[00:39.26]所以只有在海洋和江河里有时在湖泊里,
[00:42.29]where mud and silt have been continuously deposited,
[00:44.81]这些泥沙不停淤积的地方
[00:47.33]that bodies and the like can be rapidly covered over and preserved.
[00:50.60]尸体之类的东西才能被迅速地覆盖而保存下来.
[00:53.86]But even in the most favourable circumstances
[00:56.24]即使是在最有利的环境中,
[00:58.62]only a small fraction of the creatures that die are preserved in this way
[01:02.05]死去的生物中也只有一小部分能被这样保存下来,