要练好基本功， 别尽学花架子。

You should spend time on basic training, not on those flourishes.

《新英汉大辞典》

毕竟我们学的这些，是来理解力和力所做的功。

Because, after all, how we got to this was coming from and trying to understand forces and the work they do.

youdao

更进一步探讨运动学，质点动力学，于加速座标系上之运动行为，功，能量，冲量，动量和质点系统与刚体动力学。

Further topics include kinematics, particle dynamics, motion relative to accelerated reference frames, work and energy, impulse and momentum, systems of particles and rigid body dynamics.

youdao

There are many kinds of work. There's electrical work, take the motor, you plug it into the wall, electricity makes the fan go around, that's electrical work. There's magnetic work.

我们复习一下大一,学过的功的概念：,物体在力的作用下，运动了一段距离。

麻省理工公开课 - 热力学与动力学课程节选