名词
中文翻译：直升飞机
同义词：
['helicopter', 'aeroplane例句：1. The police helicopter was seen circling above the crime scene.（警用直升机被看到在犯罪现场上方盘旋。）2. The pilot had to make an emergency landing due to bad weather conditions.（由于恶劣的天气条件，飞行员不得不紧急降落。）']
例句：
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1. The police helicopter was seen circling above the crime scene.
警用直升机被看到在犯罪现场上方盘旋。
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2. The pilot had to make an emergency landing due to bad weather conditions.
由于恶劣的天气条件，飞行员不得不紧急降落。
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3.The military used helicopters to transport troops during World War II.
二战期间，军队使用直升机运输部队。