名词
中文翻译：飞行高度余量
同义词：
['airspeed', 'altitude reserve', 'altitude margin', 'airspace', 'altitude clearance例句：1. The pilot must maintain a headroom of at least 500 feet above the ground to clear obstacles.（飞行员必须保持至少500英尺的飞行高度余量来避开障碍物。）']
例句：
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1. The pilot must maintain a headroom of at least 500 feet above the ground to clear obstacles.
飞行员必须保持至少500英尺的飞行高度余量来避开障碍物。
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2. The aircraft's headroom is critical for its ability to perform maneuvers and avoid collisions.
飞机的飞行高度余量对其执行机动和避免碰撞的能力至关重要。
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3. The pilot carefully monitored the headroom during takeoff and landing to ensure safety.
飞行员在起飞和降落时仔细监控了飞行高度余量，以确保安全。