a letter sent by air mail 同义词：airmail letter, aerogram, aerogramme,
例句与用法
1.
What is the postage for an air letter 寄一封航空信的邮费要多少？
2.
Express delivery service is only available for unregistered air letter - post items only 快邮服务只限于非挂号空邮邮件。
3.
Express delivery service is only available for unregistered air letter - post items only 快邮服务只限于非挂号空邮邮件。
4.
Air letter and parcel services are available to all places except bardai 除巴尔达伊外，所有地方均可获航空信件及包裹服务。
5.
All postal services are temporarily suspended except ordinary air letter and registered air letter containing personal correspondence 除内有私人讯息的普通及挂号航空信件外，所有邮政服务暂时停止。
6.
By air to vancouver thence by surface . all postal services are temporarily suspended except ordinary and registered air letter mail to berbera , borama , burao and hargeisa 除寄往柏培拉、博拉马、布尔奥及哈尔格萨的普通及挂号航空邮件外，所有邮政服务暂时停止。
7.
The assistant postmaster general ( postal ) , mr . k . l . tsang , announced today ( 21 march ) that due to the present situation in iraq , air letter mail containing personal correspondence to iraq is subject to delay . all other postal services to iraq have been suspended since mid - 1991 香港邮政助理署长（邮务）曾国林今日（三月二十一日）宣布，由于现时伊拉克局势影响，寄往该地的私人空邮信件服务将受阻延。
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