形容词
中文翻译：亚音速的
同义词：
['subsonic', 'subsonic例句：1. The sound of the engine is subsonic.（发动机的声音是亚音速的。）2. The aircraft flew at a subsonic speed.（飞机以亚音速飞行。）']
例句：
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1. The sound of the engine is subsonic.
发动机的声音是亚音速的。
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2. The aircraft flew at a subsonic speed.
飞机以亚音速飞行。
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3.The wind was blowing at a subsonic speed.
风以亚音速吹过。