形容词
中文翻译：亚音速的
同义词：
['subsonic', 'subsonic例句：1. The aircraft was flying at a subsonic speed.（飞机以亚音速飞行。）']
例句：
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1. The aircraft was flying at a subsonic speed.
飞机以亚音速飞行。
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2.The sound of the engine is subsonic.
引擎的声音是亚音速的。
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3. The physics experiment demonstrated the principle of subsonic flow.
这个物理实验展示了亚音速流动的原理。