There, Newton doesn't tell you what forces are going to be acting on a body in a given situation.

在式子里,牛顿没有告诉你,在给定条件下,有哪些力,作用在物体上

耶鲁公开课 - 基础物理课程节选

Then we may, from this equation, say a certain force is acting in a given situation by multiplying the m times the a.

然后根据这个方程,我们就能说,得到给定条件下的作用力,它等于 m 和 a 的乘积

耶鲁公开课 - 基础物理课程节选

I think we're still in a precarious situation but I think we do have central bankers who are working effectively given the tools that they have.

我认为我们仍处于一个不稳固的情形之中,但是我们也有那些,用手中的金融工具有效率地工作的,中央银行主。

耶鲁公开课 - 金融市场课程节选