Students all over the country are facing an uncertain future.全国各地学生前途未卜。The sandbank was uncertain, like quicksand under his feet.那个沙坝并不稳固，他脚下如同踩着流沙一般。For a minute he looked uncertain, and then recovered his composure.有一...
In industry, diamond can form a tough, non-corrosive coating for tools.在工业上，金刚石可以用作工具表面坚固、耐腐蚀的覆盖层。the corrosive effects of salt water盐水的腐蚀作用Many highly corrosive substances are used in the nuclear industry.核工业使用许多腐蚀性很强的物...