| 释义 |
Mach/mɑ:k, mæk/n. (in full 全称 Mach number) the ratio of the speed of a body to the speed of sound in the surrounding medium; often as Mach 1, 2, etc., indicating the speed of sound, twice the speed of sound, etc. 马赫(马赫数) (物体移动的速度与音速之比：马赫 1 为 1 倍音速，马赫 2 为 2 倍音速，等等)[named after E. Mach, Austrian physicist d. 1916] |