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.

他们将铁与碳混合制成钢。

They ___alloyed iron with carbon to make steel.

成功的喜悦被些许担忧所冲淡。

The joy of success was ___alloyed with a touch of worry.