名词
中文翻译：古代的货币同义词
同义词：
['ancient coin', 'ancient currency']
例句：
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1. The ancient coins are now rare and valuable.
这些古代硬币现在非常稀有且有价值。
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2. The ancient coins were used to pay taxes during the Roman Empire.
古币在罗马帝国时期被用来支付税款。
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3. The ancient coins have been discovered in many archaeological sites around the world.
世界各地的许多考古遗址都发现了古币。