The alternation of sun and snow continued for the rest of our holiday.我们剩余的假期里依旧时而晴天时而下雪。Light and shade come in swift alternation ; Days and months flash by as quickly as a weaver's shuttle.光阴似箭,日月如梭.There is an al...
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...