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....
通往和平的道路将很漫长。The road to peace will be long and drawn-out.他强烈要求保留北大西洋公约组织以维护和平。He argues strongly for retention of NATO as a guarantee of peace.他们被劝服，认识到了和平的好处。They have been per-suaded of the merits of peace....
While searching for a way to augment the family income, she began making dolls.为了想法子增加家庭收入，她开始制作洋娃娃。Mother gives him two dolls of automatic kick on boxes.母亲给他两只会自动跳出盒的玩偶.This old woman dolls herself up like a young lady....
数学试卷和英语试卷很难。The papers in maths and English are very testing.他打破了用拉丁语出试卷的传统。He broke with the tradition of setting examinations in Latin.老师在教室里走了一圈收试卷.The teacher went round the class to gather the papers....