the speed of something in a given direction 速度,速率 the velocities of the emitted particles. 放射微粒的速率。 ■(in general use) speed 速度 the tank shot backwards at an incredible velocity. 坦克以令人难以置信的速度后退。 ■(亦作velocity of circulation)(Economics)the rate at which money changes hands within an economy (经济)周转率流通速度
语源
late Middle English: from French vélocité or Latin velocitas, from velox, veloc-'swift'