Our neighbour's a very careless bis driver; he never thinks about what he's responsible for.
我们邻居是个粗心大意
公共汽车驾驶员,从来不考虑自己有什么责任。
Our neighbour's a very careless bis driver; he never thinks about what he's responsible for.
我们邻居是个粗心大意
公共汽车驾驶员,从来不考虑自己有什么责任。
Preparation of ethylene bis stearamide using stearyl chloride and ethylenediamine (EDA) as raw materials has been studied.
研究了以乙二和硬脂酰氯为原料制备乙撑双硬脂酰
,
论了原料配比、
时间、
温度
影响。
In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.
本文对醛和二甲基二氯硅烷合成二甲硅基双烯醇醚进行了研究。
Some experiments were did on herbicide activity, and had found that activities of some compounds was good,especially 3,6-bis-benzyl-s-tetrazine.
对其中部分化合物进行了生物活性实验,发现有些化合物显示了较好活性,同时发现烷基取代基
引入可以提高除草活性。
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