名词
中文翻译：飞机群
同义词：
['aircraft formation', 'aircraft fleet', 'air force', 'air group']
例句：
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1. The pilot was able to guide the plane through the dense fog.
飞行员能够带领飞机穿越浓雾。
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2. The airline had a fleet of 500 airplanes.
该航空公司拥有500架飞机。
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3. The military air force is responsible for maintaining national security.
军事空军负责维护国家安全。