Mach
n[U]
(followed by a number 後接数词) ratio of the speed of sth (esp an aircraft) to the speed of sound 马赫
an aircraft flying at Mach two, ie twice the speed of sound 以两倍於音速飞行的飞机.
🏥 医学释义
马赫(音速单位)
🗣️ 情景例句
get some background on the job.
了解这项工程的一些背景。
I left very early last night, but I wish I hadn't left so early.