The absolute number that you assign to it is something that's arbitrary. You have to set what the zero is. And so there's a well-understood convention for what the zero is.

你指定给它的绝对值是有任意性的,你需要设定零点的位置,因此有一个经过充分研究的,关于设定零点的约定。

麻省理工公开课 - 热力学与动力学课程节选

You've got to show not only have you understood the ideas that have been put forward in the readings and in the lectures and so forth, but you see how to sort of put them together in the paper in a way that shows you've got some aptitude here.

不只是表现出你们理解了那些概念,那些阅读中的课堂上的及其他的内容，你们还得想办法在论文中把他们组合起来,要显得有点天分。

耶鲁公开课 - 死亡课程节选