马氏本，马登斯体一种由铁和高达百分之一的碳组成的溶液，是硬化碳工具钢的主要成分
A solid solution of iron and up to1 percent of carbon, the chief constituent of hardened carbon tool steels.
硅铁一种用于生产碳素钢的铁和硅的合金
An alloy of iron and silicon used in the production of carbon steel.
把铝和其他金属混合，科学家们能够制造出各种合金，其中一些具有钢一样的强度，但其重量只是钢的三分之一。
By mixing aluminium with other metals, scientists have been able to produce a variety of alloys, some of which have the strength of steel but weigh only one third as much.
