气流的最大穿透深度随气体动量的增加而增加，而氧气喷枪的直径保持恒定。

The maximum penetration depth of gas flow is increased with the increase of gas momentum while the diameter of oxigen gunjet keeps constant.

youdao

角动量的改变就是,力乘以δ

The angular momentum change must be torque t times delta t.

youdao

角动量的矢量会怎样呢？

What will the angular momentum vector do?

youdao

And this is just a Newtonian expression of momentum, the product of the mass of the electron times its instant velocity.

这只是牛顿学上关于动量的表达，用电子质量,乘以瞬时速度。

麻省理工公开课 - 固态化学导论课程节选

And in terms of equations that we use, it's sometimes easier to plug in the fact, since momentum is equal to mass times velocity.

在我们使用方程这方面，事实上有时是很容易代入的，因为动量等于质量乘以速度。

麻省理工公开课 - 化学原理课程节选

And the relationship that he put forth is that the momentum is equal to Planck's constant times nu divided by the speed of light, or it's often more useful for us to think about it in terms of wavelength.

爱因斯坦提出的关系式是,动量等于普朗克常数,乘以υ除以光速，或者用波长来表示,通常更容易让我们想明白。

麻省理工公开课 - 化学原理课程节选