airmail/'eəmeɪl $ 'er-/

n. the system of sending letters and parcels by plane

n. [U] 航空邮递：send a letter by airmail 用航空邮递寄信

◇an airmail letter 航空信件

◇airmail postage 航空邮资

构词air + mail

常犯错误

✗ an airmail

✓ an airmail letter 一封航空邮件