它们有哑铜的，古铜的和镀银的。They are available in polished brass, antique brass or silver-plate.要求学生们检验铜的纯度.The students are asked to prove the purity of copper.夹头和电极之间的接触面是银的或铜的.The contact area between clamp and terminal is either ...
Feng Yun - ching answered hastily , springing up and all but overturning the opiumlamp as he did so.冯云卿陡的跳起来说,几乎带翻了烟盘里的烟灯.Overturning and sliding are seldom a factor in the design of arch dam.拱坝设计中很少考虑倾覆和滑动的问题.Overturnin...
Computers and electronics are growth industries and need skilled technicians.计算机与电子行业属于蓬勃发展的产业，需要娴熟的技术人员。Many graduates are employed in the electronics and computing industries.很多毕业生就职于电子和计算机行业。Racal Electronics shares h...
The synthetic route of geraniol and nerol was studied.本文研究了香叶醇和橙花醇的合成方法.A structural isomer of citral that is obtained from the oxidation of geraniol.葡萄糖的一种异构体,见于蜂蜜和甜水果中....