求翻译：铁合金是铁与一种或几种金属或非金属元素组成的合金。一般情况下，用加入铁合金的办法来改变钢和铸钢的性能，而很少使用纯金属。是什么意思？

Alloy of iron and one or more metal or non-metallic elements of the alloy. Under normal circumstances, the method used to join alloy steel and cast to change the performance of the pure metal is rarely used.

Ferro Alloys are iron with one or several the alloy Metal or metallic elements. Under normal circumstances, ferro-alloys used to join the ways to change the performance steel and cast steel, and are rarely used pure metal.

The ferroalloy is hard and one kind of either several metals or the nonmetallic element composition alloy.In the ordinary circumstances, with joins the ferroalloy the means to change the steel and the cast steel performance, but very little uses the fine metal.

Iron and ferro-alloy is composed of one or more metal or non metal alloys. Under normal circumstances, use join Ferroalloy way to change the properties of steel and cast steel, and rarely use pure metals.

Iron and ferro-alloy is composed of one or more metal or non metal alloys. Under normal circumstances, use join Ferroalloy way to change the properties of steel and cast steel, and rarely use pure metals.