I've got to find them by experimenting, by putting other bodies and seeing how they react and then finding out what's the force that acts on a body when it's placed in this or that situation.

我得通过实验找出这些力,我会增加其它物体,观察其反应,求出当它处在这种或者那种情况下时,作用在物体上的力

耶鲁公开课 - 基础物理课程节选

This fellow who was just interviewed on this is a man named Philip James who's in London and runs a group called The International Obesity Task Force, and probably more than anyone in the world, knows the world situation about food and food policy.

视频中的这位先生,来自伦敦,名叫菲利普·詹姆斯,他负责主持国际肥胖特别工作组,也许他比我们任何人都了解,现在世界粮食和粮食政策的形式

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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