名词
中文翻译：美元
同义词：
['dollar', "silver coin例句：1. He bought asilver dollar for his grandmother's birthday.（他为祖母的生日买了一枚银元。）"]
例句：
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1. He bought asilver dollar for his grandmother's birthday.
他为祖母的生日买了一枚银元。
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2.The old man kept the silver dollar asa reminder of his past.
老人把那个银元作为过去的回忆保留着。
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3. Thesilver dollar was worth more than the houseit was in.
那枚银元的价值超过了它所在的房子。