下午的热辐射反作用力就大于上午，因此，始终有那么点力作用于下午一侧，逐渐地就使小行星偏离轨道。

The reaction to this radiation is greater on the afternoon side than on the morning side and there is thus a small force pushing on the afternoon side that gradually distorts the asteroid's orbit.

youdao

热力作用是与应力、重力相类同的一类地质作用力。

Thermal action is a kind of geological force similar to stress and gravity.

youdao

粘土吸水后的总膨胀量是由于本身微观内容的相互作用力及外界吸力和斥力作用后达到新的平衡的结果。

The total amount of expansion of water-absorbed clay is due to the result of new equilibrium established between the interaction forces of its microcontent and the external faces.

youdao

So, what we're looking at here is the force when we have two charged particles, one positive one negative -- here, the nucleus and an electron.

我们现在研究的是,一正一负俩个带电粒子之间的,作用力-在这里。

麻省理工公开课 - 化学原理课程节选

But you can also look at it qualitatively, so, if you think about the force between the electron and the proton, you could just qualitatively think about what's happening.

但你也可以定性的来研究这个问题，所以如果你们考虑电子,和质子之间的作用力,你可以定性的来想。

麻省理工公开课 - 化学原理课程节选

If nothing is touching the body, there are no forces on it, with one exception which is, of course, gravity.

如果没有实体接触,那么它就不受作用力,当然一个例外那就是引力

耶鲁公开课 - 基础物理课程节选