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2013-05-23 12:21
求翻译：The accidental introduction of earthworms to North America may have been the best outcome of contact between the early settlers and native peoples. While the Indians suffered from lack of exposure and immunity to European diseases, the fertility of many North American soils was greatly enhanced through the recycling of是什么意思？ 待解决
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The accidental introduction of earthworms to North America may have been the best outcome of contact between the early settlers and native peoples. While the Indians suffered from lack of exposure and immunity to European diseases, the fertility of many North American soils was greatly enhanced through the recycling of
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