名词
中文翻译：现金信函
同义词：
['cash message', 'cash note', 'cash receipt']
例句：
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1. Thecash letter was addressed to the bank manager.
这封信是寄给银行经理的。
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2. Hereceived a cash letter from his friend askingfor help.
他收到了朋友的一封现金信，请求帮助。
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3. She wrote a cashletter to her sister, expressing her loveand gratitude.
她写了一封现金信给她的姐姐，表达了她的爱和感激之情。