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2013-05-23 12:21
求翻译：Grafting can join scions with desirable qualities to root stock that is strong and resists disease and insects. Smaller trees can be grafted with older scions. The American Environmental Protection Agency says grafting can reduce the need to use pesticides on crops. The E.P.A. found that grafting stronger plants cost l是什么意思？ 待解决
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Grafting can join scions with desirable qualities to root stock that is strong and resists disease and insects. Smaller trees can be grafted with older scions. The American Environmental Protection Agency says grafting can reduce the need to use pesticides on crops. The E.P.A. found that grafting stronger plants cost l
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