名词
中文翻译：空邮件
同义词：
['air postal mail', 'airmail例句：1. The package arrived in a week', 'which is much faster than regular mail.（这个包裹一周就到了，比普通邮件快多了。）2. Airmail services are available for international shipments.（国际快递提供空运服务。）']
例句：
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1. The package arrived in a week, which is much faster than regular mail.
这个包裹一周就到了，比普通邮件快多了。
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2. Airmail services are available for international shipments.
国际快递提供空运服务。
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3.I sent my parents some air-mail letters to express my love and gratitude.
我给父母寄了一些空邮信，表达我的爱和感激之情。