他是个模范的专业人士，是年轻人的榜样。He is a model professional and an example to the younger lads.上司们形容他是个模范官员。He was described by his seniors as a model officer.她是全班的模范.She was an example to the rest of the class....
锌基合金的压铸件总是在氰化镀液中镀铜.Zinc base die castings are always copper plated in cyanide baths.简要回顾了无氰碱性镀铜的发展历史.The development history of cyanide - free copper electroplating is briefly reviewed.指出了普通镀铜工艺的缺点.The disadvantages of c...
A fine - grained, light - colored granitic rock consisting primarily of orthoclase and quartz.一种由铁锰钨酸盐组成的矿物, 晶体状,主要的钨矿石,见于与花岗岩伴生的石英脉中.A usually coarse - grained igneous rock composed chiefly of calcic plagioclase and pyr...