box number
参考词典中box number的常规释义：
基本释义
- n. 信箱号
英英解释
2个名词解释
- the number of a letter box at the post office where mail is collected
[同] box number, po box no, po box number, post-office box number - a mailing address to which answers to a newspaper ad can be sent
点击查看……- the number of a letter box at the post office where mail is collected
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