In this way,DDT before it was banned reached levels high enough to seriously disrupt the re production of many birds in North America,especially hawks,owls,and eagles.
英
美
释义
通过这种方式,DDT在被禁止之前其含量已经很高,足以严重破坏北美许多鸟类的繁殖,尤其对于鹰和猫头鹰的破坏更为严重。
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