机械英语复试翻译资料 1 由菲欧工作室整理 第一课 It is known that metals are very important in our life. Metals have the greatest importance for industry. All machines and other engineering constructions have metal parts; some of them consist only of metal parts. 众所周知，金属在我们的生活中是非常重要的，金属对于工业而言是有巨大的重要性，所有机器和其他工程构造都有金属零部件，其中一些还只能由金属组成。 There are two large groups of metals: 1) Simple metal- more or less pure chemical elements 2) Alloys- materials consisting of a simple metal combined with some other elements. 有两大类金属：（1）纯金属——或多或少的金属元素（2）合金——组成纯金属的原料结合其他元素。 About two thirds of all elements found in the earth are metals, but not all metals may be used in industry. Those metals which are used in industry are called engineering metals. The most important engineering metal is iron, which in the form of alloys with carbon and other elements, finds greater use than any other metal. Metals consisting of iron combined with some other elements are known as ferrous metals; all the other metals are called nonferrous metals. The most important nonferrous metal are copper, aluminum, lead, zinc, tin, but all these metals are used much less than ferrous metals, because the ferrous metals are much cheaper. 在地球上发现的所有元素中，大约三分之二是金属元素，但是并不是所有的金属都能够用于工业上。那些金属—我们用于工业上的金属—被称为工程金属，最重要的工程金属那就是铁，铁跟碳和其他元素结合形成合金的那些金属比其他金属发现有更大用途。铁与别的其他某些元素相结合而组成的金属称为黑色金属，此外所有其他金属都称为有色金属，最重要的有色金属是---铜，铝、铅、锌、锡。但是使用这些有色金属比使用黑色金属要少的多，因为黑色金属便宜得多。 Engineering metals are used in industry in the form of alloys because th...
