单词 | 包层硬币 |
释义 | DEFINITIVE EXAMPLES 权威例句〔sandwich coin〕A coin having a layer of one metal, such as copper, between exterior layers of a different metal, such as silver.简易硬币,包层硬币:一种硬币,夹层为一种金属(如铜夹层),外层为不同金属(如银外层)美国传统 |
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