velocity
n
1 [U, C] (esp physics 尤用於物理学) (usu of inanimate things 通常用以指无生命之物) speed, esp in a given direction 速度(尤指沿已知方向的)
gain/lose velocity 增加[降低]速度
the velocity of a projectile 一个抛射体的速度.
2 [U] (fml文) quickness or swiftness 迅速; 快速
Gazelles can movewith astonishing velocity. 羚羊跑起来有时速度惊人.