如果我让总能量为正，它就不是一个椭圆了。

If I make the total energy positive, it's not an ellipse.

youdao

如果总能量为正，轨道就不规则了。

If the total energy is positive, the orbit is not bound.

youdao

从这里开始上升，斜率为正。

And I'm going to go up from there, positive slope.

youdao

So, for example, for the chlorine case, we would say that the electron affinity for chlorine is actually positive 349 kilojoules per mole.

比如，以氯为例，我们可以说氯的电子亲和能,应该等于正的，349，千焦每摩尔。

麻省理工公开课 - 化学原理课程节选

But when you call something "canon," you mean that there's a group of writing that has boundaries to it.

但是当你称某样东西为正典时,便是指那些有界限的书籍。

耶鲁公开课 - 新约课程节选

So, for example, if we were looking at the actual wave function, we would say that these parts here have a positive amplitude, and in here we have a negative amplitude.

我们看，一个波函数,我们说，它这部分幅值，为正,这部分幅值为负，当我们看。

麻省理工公开课 - 化学原理课程节选