点击下方单词,选择对的这个单词
1. 亚音速的;亚音速飞行的Subsonic speeds or aeroplanes are very fast but slower than the speed of sound.
1. (of speed) less than that of sound in a designated medium
e.g. aircraft flying at subsonic speeds
形容词supersonic
多通过句子记忆单词,而不是单独死记硬背。