马赫 mǎhè Ernst Mach Origin Definitions Defs Strokes Stroke Words Sentences Sents 舒马赫 shūmǎhè Schumacher Schumacher (German name), especially Michael Schumacher (1969-), German Formula One racing driver马赫数 mǎhèshù Mach number the ratio of the speed of an object to the speed of sound in the surrounding medium, used in fluid mechanics and aerodynamics