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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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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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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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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 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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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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- Mrs. n.夫人,太太(对无特殊头衔的已婚妇女的称呼);
- must modal. 必须;一定;应该;一定要;n.必须做的事;
- cut v.切割;割破;切下;切成;修剪;削减;让…逃跑;释放;剪辑;停止;断绝关系;旷课;伤害;切牌;相交;灌制唱片;开始长(新牙);n.伤口;破口;削减;发型;样式;份额;删减;割下的一块肉;
- Poor Things 可怜的东西;可怜的家伙
- happy birthday n.生日快乐;
- econ abbr.economy 经济;economic 经济的;economical 节约的;economics 经济学;
- blackboard n.黑板;
- vanilla n.香子兰,香草;香子兰荚;香子兰精,香草精;adj.香草的;香草味的;相对没有新意的,普通的;
- was v. 用来表示某人或某物即主语本身,用来表示某人或某物属于某一群体或有某种性质( be的过去式 );在,存在;不受干扰;
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- personally adv.在个人看来;亲自;当面地;个别地;私人地;无礼地;
- tide n.潮汐;潮流,趋势;时机;时期,季节;

