名词
中文翻译：不纯金属
同义词：
['dirty metal', "impure metals例句：1. The old clock's mechanism was made of pure gold", 'but the metal inside was impure.（这个旧时钟的机制是用纯金做的，但里面的金属是不纯的。）']
例句：
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1. The old clock's mechanism was made of pure gold, but the metal inside was impure.
这个旧时钟的机制是用纯金做的，但里面的金属是不纯的。
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2.The scientist used a mixture of impure metals to create new alloys.
这位科学家用混合物来制造新的合金。
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3.The car's engine is made of impure metal parts, which can cause it to overheat.
这辆车的引擎是由不纯金属部件制成的，这可能会导致它过热。