名词
中文翻译：直升机
同义词：
['helicopter', 'aeroplane', 'aerial vehicle']
例句：
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1. The pilot was able toland the helicopter safely on the runway.
飞行员成功地将直升机安全降落在跑道上。
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2.Helicopters are used for bothmilitary and civilian purposes.
直升机既用于军事目的，也用于民用目的。
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3. The helicar's rotors were damaged duringthe crash.
直升机的旋翼在坠机时受损。