| 单词 | 航空信件 |
| 释义 | 〔aerogram〕An air-mail letter in the form of a lightweight sheet of stationery that folds into its own envelope for mailing at a relatively low postage rate. Also called air letter 航空邮件：写于轻薄纸张之上，装入专用信封之中以较低邮费投递的航空信件 也作 air letter |
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