名词
中文翻译：铜
同义词：
['brass', 'brassy', 'bronze', 'zinc']
例句：
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1. Copperis a metal that is often used inelectrical wiring.
铜是一种常用于电气线路的金属。
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2. The copper coins were melteddown to make new ones.
这些铜币被熔化用来制造新的。
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3. Copper is also known forits shiny appearance and malleability.
铜因其闪亮的表面和可塑性而闻名。