s是距離啊,為了區(qū)分
v代表velocity
金山詞霸的解釋：velocity
ve.loc.i.ty
AHD:[v…-l¼s“¹-t¶]
D.J.[v*6l%siti8]
K.K.[v*6l$s!ti]
n.（名詞）
【復(fù)數(shù)】 ve.loc.i.ties
Abbr.vel.Rapidity or speed of motion; swiftness.
縮寫 vel.迅速,快速：運(yùn)動的快速或速度；迅速
Abbr.VPhysics A vector quantity whose magnitude is a body's speed and whose direction is the body's direction of motion.
縮寫 V【物理學(xué)】 速度：一種向量,其量值為物體的速率,其方向?yàn)槲矬w運(yùn)動的方向
The rate of speed of action or occurrence.
速率：行動或發(fā)生的速率
The rate at which money changes hands in an economy.
周轉(zhuǎn)率：在某一經(jīng)濟(jì)制度中金錢易手的速率