名词
中文翻译：Unknown
同义词：
['air freight', 'air transportation', 'air shipment']
例句：
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1. The company offers air freight services to its customers worldwide.
该公司向其全球客户提供空运服务。
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2. Air transportation is becoming more popular as people prefer it over road travel.
随着人们偏好空中旅行而使得航空运输越来越受欢迎。
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3. The package was sent by air shipment to ensure it arrived on time.
该包裹通过空运发送，以确保准时到达。