So it's a really powerful and simple formalism, once we set up what is needed the go through it, right?

因此这是一种很强大而简单的形式,一旦我们定下需要什么,就可以推导出它，对吧？

麻省理工公开课 - 热力学与动力学课程节选

But then having found one answer, you can add to it anything that gets killed by the act of taking derivatives.

一旦你算出了一个答案,你就可以往式子里加入任何,在求完导后消失的项

耶鲁公开课 - 基础物理课程节选

As soon as he has expressed this epic ambition -Virgil explains that as soon as he's expressed this Phoebus Apollo, the god of poetry, stepped in and chided him.

一旦他表达出了这种野心,正如维吉尔写道，诗歌之神阿波罗，闯入诗歌的篇章并指责他。

耶鲁公开课 - 弥尔顿课程节选

But it's a tempting philosophical thought to say, "Once I've shown it's better never to have been born, " it follows that suicide is the appropriate response."

但这是一个引诱人的哲学想法，“一旦我明白了最好还是不要出生，就会出自杀是合适行动的结论“

耶鲁公开课 - 死亡课程节选

We don't always want to go and solve the Schrodinger equation, and in fact, once we start talking about molecules, I can imagine none of you, as much as you love math or physics, want to be trying to solve this Schrodinger equation in that case either. So, what Lewis structures allow us to do is over 90% of the time be correct in terms of figuring out what the electron configuration is.

我们并不想每次都去解薛定谔方程，而且实际上，一旦我们开始讨论分子，我可以想象,你们中没有一个人，不管你有多么热爱数学或物理，会想去解这种情况下的薛定谔方程,总之，路易斯结构能让我们,有超过，90%，的概率判断出正确的,电子排布。

麻省理工公开课 - 化学原理课程节选

Once you got a = 2, you can go back and realize here that f = 4, so you got really 4 Newtons.

一旦你算出 a = 2,你可以回到上面来,求出 f = 4,所以实际上这个力有 4 牛

耶鲁公开课 - 基础物理课程节选

Once you find a = 2, you find T = 6.

一旦你算出 a = 2,你就可以算出 T = 6

耶鲁公开课 - 基础物理课程节选

So what I want to point out with this case in beryllium is that you don't have to use all of the electrons to figure out the bond order, and in fact, once you get to molecules 10 that are from atoms with atomic numbers of 8 or 10, you're not going to want to maybe draw out the full molecular orbital diagram.

我要指出的是,在Be这种情况下,你不需要利用,所有的电子来指导键序，实际上，一旦分子中,原子序数到达了8或者，你也许不想画出,整个分子轨道图。

麻省理工公开课 - 化学原理课程节选