| 词汇 | dead letter |
| 释义 | dead letterBrE /ˌded ˈletə(r)/ NAmE /ˌded ˈletər/ noun [usually sing. ]a law or an agreement that still exists but that is ignored 无人遵守的法律；形同虚设的协定；空文(especiallyNAmE ) a letter that cannot be delivered to an address or to the person who sent it 死信；无法投递（或退回）的邮件 |
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