名词中文翻译
中文翻译：死信
同义词：
['deceased mail', 'deceased letters', 'deceased postal matter']
例句：
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1.The letter was returned undelivered because the address was wrong.
这封信因为地址写错了被退回了。
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2. The post office has a special section for dead letters.
邮局有一个专门处理死亡信件的部分。
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3.He sent a letter to his grandmother but never received a reply.
他寄给祖母一封信，但从未收到回复。