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Mach

noun
/mɑːk/, /mæk/
/mɑːk/, /mæk/
[uncountable]
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  1. (often followed by a number常后接数字) a measurement of speed, used especially for aircraft. Mach 1 is the speed of sound.马赫,马赫数(速度单位,尤用于计算飞行速度,1 马赫等于音速)
    • a fighter plane with a top speed of Mach 3 (= 3 times the speed of sound)最高速度为 3 马赫的歼击机
    Word Origin1930s: named after E. Mach (1838-1916), Austrian physicist and philosopher of science.
Mach
Units for measuring speed of movement: acceleration, knot, kph...

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