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2013-05-23 12:21
求翻译：The authors of the Ambio study examined samples of the upper layers of a soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected.是什么意思？ 待解决
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- 离问题结束还有
The authors of the Ambio study examined samples of the upper layers of a soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected.
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