Gravity is one force that acts on a body without the source of the force actually touching it.

引力是一种受力物体收到了力的作用,但却没有接触施力物体的力

耶鲁公开课 - 基础物理课程节选

We focus on one because we are paying for it, but the wall is doing the opposite.

我们只关注某一边因为我们只对这一边施力,但是墙对另一边有反向的作用力

耶鲁公开课 - 基础物理课程节选

Now one other thing that Hirsch says, the other thing that I quoted, is in effect ] -I'll paraphrase now-- that what Gadamer omits to realize is that there is a difference between the meaning of a text and the significance of a text.

赫施说的另外一点，即我引用的另一点，现在起作用了,我现在开始来释意-,葛达玛没有发现的是,文章的含义和文章的意义之间的差别。

耶鲁公开课 - 文学理论导论课程节选

Whenever there is a force, it can be traced back to a tangible material cause, which is all the time a force of contact, with the exception of gravity.

如果有作用力,那它一定能找到一个明确的实体施力物体,也就是无论何时物体受的都是接触力,引力除外

耶鲁公开课 - 基础物理课程节选