subsonic aircraft編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看subsonic aircraftsubsonic aircraft — 名詞名詞1. an aircraft that flies at speeds slower than the speed of sound1.名詞釋義次音速飛機an aircraft that flies at speeds slower than the speed of sound例句Subsonic aircraft are more fuel-efficient than supersonic jets.