小学生英语作文带翻译：地球上的昔日生命

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小学生英语作文带翻译：地球上的昔日生命

It is animals and plants which lived in or near water whose remains are most likely to be preserved, for one of the necessary conditions of preservation is quick burial, and it is only in the seas and rivers, and sometimes lakes, where mud and sit have been continuously deposited, that bodies and the can be rapidly covered over and preserved.只有生活在水中或水边的动植物尸体最有可能被保存下来，由于保存的必要条件之一是快速掩埋，所以只有在泥沙不停淤积的海洋和江河里，有时在湖泊里，尸体之类的东西才能被快速地掩盖而保存下来。

But even in the most favourable circumstances only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them.After all, all living creatures live by feeding on something else, whether it be plant or animal, dead or alive, and it is only by chance that such a fate is avoided. The remains of plants and animals that lived on land are much more rarely preserved, for there is seldom anything to cover them over.When you think of the innumerable birds that one sees flying bout, not to mention the equally numerous small animals




like field mice and voles which you do not see, it is very rarely that one comes across a dead body, except, of course, on the roads. They decompose and are quickly destroyed by the weather or eaten by some other creature.即使是在最有利的环境中，死去的生物中也只有一小局部能在开头腐烂前，或更可能在被食腐动物吃掉之前，被这样保存下来。由于一切生物都是靠吃别的东西来活命的，不管这种东西是植物还是动物，死的还是活的，因此，生物间或才能避开被吃掉的命运。曾在陆地上生活过的动植物的遗体被保存下来的更为罕见，由于陆地上几乎没有什么东西掩盖它们。你可以想象出天上有看得见的飞来飞去、数不清的鸟，地上有不惹眼的很多的老鼠和田鼠之类的小动物，但是，除非在路上，很少有人遇到这些动物的尸体，由于它们腐败之后很快就被风化掉，或被别的动物吃掉了。

It is almost always due to some very special circumstances that traces of land animals survive, as by falling into inaccessible caves, or into an ice crevasse, like the Siberian mammoths, when the whole animal is sometimes preserved, as in a refrigerator. This is what happened to the famous Beresovka mammoth which was found preserved and in good condition.In his mouth were the remains of fir trees -- the last meal that he had before he fell into the crevasse and broke his back. The mammoth has now just a suburb of

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