他虽然体型小,速度可真快啊!
采用无段变速马达,速度可自由调整。
激光手术因削减了部门止血步骤,速度可稍有提高。
Laser operation for cutting the Department of hemostatic steps, speed can be improved a little.
What it means is if you'd release a rock at that location one second before with a certain speed that we can calculate, it would've ended up here with precisely the position and velocity it had at the beginning of our experiment.
它的意义在于,若在该处以特定速度抛出一个物体,这个速度可通过计算得到,一秒之后,物体会运动至我们设定的起点,并且速度为我们设定的初速度
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