| 词汇 | mach |
| 释义 | mach/mɑ:k;mæk ||; mɑk; mæk/noun [u] (often followed by a number 常用于数字之前) a measurement of speed, used especially for aircraft. mach 1 is the speed of sound. 马赫(速度计量单位,尤指飞机的,1马赫等于音速) |
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