名词
中文翻译：硬币
同义词：
['penny', 'dime', 'quarter']
例句：
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1. He spent the entire day counting his coins.
他花了一整天数他的硬币。
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2. The old man kept a small collection of coins in his wallet.
那位老人在他的钱包里收藏了一些硬币。
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3. The coin collector was amazed by the rare coins he found.
这位硬币收藏家对他所发现的稀有硬币感到惊讶。