其中β -HCH 和p, p-DDE分别是HCHs和DDTs的特征残留单体.
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The residual levels of DDTs, HCHs in soil were different with different utilization types.
土壤中DDTs 、 HCHs残留在不同土壤利用方式下有所不同.
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Organic chlorinated pesticide such as DDTs is one kind of typical global environmental pollutant.
有机氯农药DDTs是全球性环境污染物,对生态环境有严重影响.
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The concentrations of HCHs , DDTs and PCBs were determined by gas chromatography ( GC ).
HCHs 、 DDTs及PCBs含量用GC法测定.
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The distributions of DDTs and PCBs is very similiar, but HCHs is different.
DDTs和PCBs有极为相似的分布特征, 而HCHs的 分布特征则不尽相同.
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TheHCHs and DDTs in the Liao River originate mainly from the use of pesticides inagriculture.
六六六和滴滴涕是主要污染物,它们主要来源于农药的使用.
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DDTs and BHCs in surface waters did not exceed the standard of surface water environment quality.
表层水体中DDTs和BHCs均未超过地表水环境质量标准；
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