alloy

不锈钢是铁和铬的合金。

Stainless steel is an ___alloy of iron and chromium.

这种合金由铜和锌混合制成，比纯铜更耐用。

This ___alloy is made by mixing copper and zinc, making it more durable than pure copper.

不锈钢是铁、铬和镍的合金，常用于制作厨具。

Stainless steel is an ___alloy of iron, chromium, and nickel, commonly used for kitchenware.