名词
中文翻译：直升机
同义词：
['rotorcraft', 'aerial vehicle']
例句：
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1.The helicopter landed safely on the runway.
直升机安全地降落在跑道上。
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2.He was able to fly a helicopter in the rain.
他在雨中能够驾驶直升机。
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3.The pilot had to make an emergency landing due to bad weather.
由于恶劣天气，飞行员不得不紧急着陆。