Leaching of copper from chalcocite with acidic acetonitrilecopper sulphate system was studied.研究了用酸性乙腈硫酸铜体系从辉铜矿中提取铜.The paper discusses a new method for producing cupric feed copper sulfate by chalcocite and ehalcopyite....
He suspected elements within the South African government were conniving at the disturbances to try to weaken the ANC...他怀疑南非政府内有一帮人纵容这些骚乱的发生，企图削弱非国大。With the elasticity of dermis and hypodermis increased, the wrinkle wi...
The handcraft workshop already existed in the age of small - scale economy.小农经济时代已经有手工作坊出现了.Animation was a handcraft, an art.动画是一门手艺, 一种艺术.We handcraft all our paper.我们所有的纸都是手工制作....
Some infantile actions survive into adulthood.某些婴儿期的行为一直保持到成年期.Pearl was a born outcast of the infantile world.珠儿生来便是那婴孩天地的弃儿.This kind of humour is infantile and boring.这种幽默既幼稚又无聊。...