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.

M, M, m, M. S., M. V. M/S, ma, ma'am, mac, mac (also mack), macabre, macadam, macadamize, macadamise, macaroni, macaroni cheese, macaroni-eating, macaroon, macaw, mace, mace-bearer, macerate, maceration, machete, machiavellian, machination, machine, machine code (also machine language), machine tool, machine-gun, machine-made, machine-readable, machinery, machinist, machismo, macho, Macintosh, mackerel, mackerel sky, mackintosh, macro-, macrobiotic, macrobiotics,