不锈钢是铁和铬的合金。

Stainless steel is an ___alloy of iron and chromium.

铜和锌被合金化制成黄铜。

Copper and zinc are ___alloyed to make brass.

纯粹的快乐被忧虑冲淡了。

The pure joy was ___alloyed by worries.