他参与了石油、锌和铅的勘探。He was involved in oil, zinc and lead prospecting.黄铜是铜锌合金。Brass is an alloy of copper and zinc.铜与锌熔合成黄铜the fusion of copper and zinc to produce brass...
It is insoluble in carbon disulphide, soluble in hot aniline and phenol.它不溶于二硫化碳, 溶于热苯胺和苯酚.Glucose - regulated protein 58 is a member of the protein disulphide isomerase superfamily.葡萄糖调节蛋白58是蛋白二硫化物异构酶家族成员之一....
Why do you look so down in the mouth?你为什么显得这样消沉?Why are you so down in the mouth, anyway?不过,你为什么这么没精打采的?Paul looks down in the mouth because she failed in the attempt.保罗因为尝试失败看起来很沮丧....