形容词
中文翻译：在飞行中的
同义词：
['in the air', 'aloft', 'in flight', 'in transit']
例句：
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1. The plane was in the air for hours before landing.
飞机在空中飞行了几个小时才降落。
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2. The pilot is in aloft to make an emergency landing.
飞行员正在高空紧急着陆。
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3. The bird was in flight when it suddenly fell from the sky.
这只鸟正在飞行时突然从天空中坠落。