释义 |
Examples:Mach (aeronautics), unit of speed based on speed of sound = 1 Mach = 1224 km per hr—lit. want sth in haste, but cannot get there (idiom, from Analects); more haste, less speed—accelerate at full power (idiom); at full speed—dial or meter for displaying speed, time, or other measurements—Mach number, multiples of speed of sound used as unit in aeronautics, with 1 Mach = 1224 km per hr—beta particle (electron, esp. high speed electron emitted by radioactive nucleus)— |