名词
中文翻译：古代货币同义词
同义词：
['ancient coin', 'ancient currency', 'ancient money']
例句：
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1. The ancient coins are now worth millions of dollars.
这些古代硬币现在价值数百万美元。
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2. The ancient coins were used for trade and exchange.
这些古代硬币用于贸易和交换。
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3. The ancient coins have been discovered in various parts of the world.
这些古代硬币在世界各个角落被发现。