名词
中文翻译：直升机航空
同义词：
['helicopter', 'aerial', 'airborne']
例句：
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1. Helicopters are used for emergency medicalservices.
直升机用于紧急医疗服务。
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2. Thepilot was trained in helicopteraviation.
飞行员接受了直升机航空训练。
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3. The aircraft is equipped withadvanced helicopter aviation technology.
该飞机配备了先进的直升机航空技术。