. . . "\u901F\u5EA6"@zh . . . _:b20103 . . . . . . . . . . . . . "Speed is the time rate of motion measured by the distance moved over in unit time."@en . . . . . . . . "u" . "v" . . . _:b19980 . "speed"@en . _:b20103 . . . . . . . _:b19981 . _:b19981 . _:b20103 . . _:b19981 . . . _:b19980 . _:b20103 . . _:b19980 . . _:b19980 _:b19981 . . . "snelheid (scalair)"@nl . . . . .