There is a very big difference in physics between speed and velocity.

物理中速率和速度的概念,是泾渭分明的。

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Pocket bicycles offer minimum speed and velocity on road and thus they can simply be termed as rocket …

袖珍自行车提供最低限度的速度和速度的道路，因此他们可以简单地称为火箭…

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The paper brings forward and analyzes the non-dimensional formulas of setover eccentric CAM from the aspects of the travel, displacement, speed and velocity of the moving parts.

提出了偏置式偏心圆凸轮机构从动件的行程、位移、速度、加速度的无量纲表达式，并对其进行分析。

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This is the starting speed, that's the rate at which it is gaining velocity, and that's how long it's been gaining it.

这是起始时的速度,这是速度的增长速率,这是加速的时间

耶鲁公开课 - 基础物理课程节选

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

耶鲁公开课 - 基础物理课程节选

They start businesses and buy foreclosures and speed the velocity of money around the economy with a gush of pent-up desire to consume after years in the desert.

FORBES: There is also some possibility that the world won't end, you know

This involves pitching the machine's nose up to reduce its forward velocity and increase the speed of rotation of the blades (and thus the amount of lift they provide) to soften the landing.

ECONOMIST: Monitor