音标：[baɪəʊdɪɡ'reɪdɪŋ] ；

v. 生物递降分解( biodegrade的现在分词 )

v break down naturally through the action of biological agents

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Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10到30积分的奖励! Thank you！

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