So, in talking about covalent bonds, we should be able to still apply a more general definition of a chemical bond, which should tell us that the h 2 molecule is going to be lower in energy than if we looked at 2 separate hydrogen atom molecules.

那么，既然提到了共价键，我们应该还可以,给化学键下一个更普遍的定义,那就是告诉我们氢分子能量应该更低,与两个分开的氢的单原子分子相比。

麻省理工公开课 - 化学原理课程节选

The possibility of definition persists.

给文学下定义还是有可能的。

耶鲁公开课 - 文学理论导论课程节选

You cannot say to me, "Take a force, due to a spring, and see what force it applies and divide by the acceleration and get the mass, " because we haven't defined force, either.

你不能说,"给弹簧施加一个力,看看它能提供多大的力,然后除以加速度,得到质量",因为我们还没给力下一个定义

耶鲁公开课 - 基础物理课程节选

Now, I haven't defined mutual fund yet.

现在我还没有给共同基金下一个定义。

耶鲁公开课 - 金融市场课程节选

The person who does that best is Michael Pollan, and when you read his book, In Defense of Food, he spends some time in the book defining what food is and working through this--this quagmire of how do we define food and what's acceptable to eat, what's socially acceptable, what's personally acceptable.

这一点上迈克尔·伯伦做得最好,你们可以看看他写的书《为食物辩护》,他在书中给食物下了定义,并深入地探讨了这个难题,即如何区分食物与能吃的东西,社会普遍接受的东西,个人能够接受的东西

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Yet, the notion of mass is defined.

人们还没给质量下定义

耶鲁公开课 - 基础物理课程节选

You realize it's very subtle, because the very first thing in that equation, which is m, has not yet been defined.

你会觉得这很微妙,因为方程里最基本的量 也就是 m,还没有人给它下定义

耶鲁公开课 - 基础物理课程节选