There are bacteria that help plants grow,others that get rid of dead animals and plants by making them decay,and some that live in soil and make it better for growing crops.

有些细菌能帮助植物生长，另一些细菌则通过腐蚀来消除死去的动物和植物，还有一些细菌则生活在土壤里，使土壤变得对种植庄稼更有好处。

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They endure for several weeks in moist soil and dead animal tissues.

它们在潮湿的土壤和死亡的动物组织中能生存数星期。

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The rapid removal of dead trees can result in soil that lacks the nutrients necessary for growth.

迅速地移除死去的树木可能会导致土壤确实树木生长所必须的营养物质。

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He and his team studied tree mass, dead wood and soil carbon in twenty-five mangrove ecosystems in the Indian and Pacific Oceans.

VOA: special.2011.05.10