Mach
noun/mɑːk/, /mæk/
/mɑːk/, /mæk/
[uncountable]- (often followed by a number) 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. - a fighter plane with a top speed of Mach 3 (= 3 times the speed of sound)