Accordingly, every modern currency unit originated as a unit of weight of gold or silver.
相应的，所有现代货币单位都起源于黄金或白银的重量。
And as a currency alternative, silver is more practical.
另外，作为货币替代品的白银更实用。
Song Yuan time, becomes in the Chinese currency history the silver monetization crucial phase.
宋元时期，成为中国货泉史上白银货泉化的关头时期。
Song Yuan time, becomes in the Chinese currency history the silver monetization crucial phase.
宋元时期，成为中国货泉史上白银货泉化的关头时期。
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