An engraved metal piece used for impressing a design onto a softer metal, as in coining money.
金属模子一种用于镌刻的金属件,可将设计好的图案压印到较软的金属上,例如压制货币。
Metal was used for money even before it was made into COINS.
金属在被制成硬币之前就已经做为货币来使用了。
No one knows for sure when people started using metal coins for money.
没人确切的知道人们从何时起开始使用金属硬币作为货币。
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