If you connect the body to a spring, which is neither compressed nor extended, there's no force acting on it.

如果将一个弹簧连在这个物体上,弹簧既没有被压缩也没有被拉伸,也不会有力作用在它上面

耶鲁公开课 - 基础物理课程节选

In Machiavelli, we have what we have come to call "modernity," given its first and most powerful expression.

因为马奇亚维利,我们才有，“现代“这个词汇“,因为它从此有了最初与最有力的表述。

耶鲁公开课 - 政治哲学导论课程节选

If the answer turns out to be no, it's going to take some sustained argument to settle it one way or the other.

如果答案是否定的,它将需要更有力的论据,去证明出个所以然

耶鲁公开课 - 死亡课程节选

For the Left, it was a sign that the state is strong, powerful, and can be vicious.

左派看来,它标志着国家是强大有力的,同时也可能是邪恶的

耶鲁公开课 - 1871年后的法国课程节选

In addition, it had a butt made also of bronze, which could be a lethal weapon.

另外,它的尾部也是铜质的,同样也可作为一种有力的武器

耶鲁公开课 - 古希腊历史简介课程节选

The free-body diagram, it says you can pick any one body that you like and apply F = ma to it, provided you identify all the forces acting on that body.

所谓隔离法,就是说你可以任意 选取一个物体,分析出它所受的所有力后,单独对其运用 F = ma 进行计算

耶鲁公开课 - 基础物理课程节选