I once landed on my face. I soon learned that it took much less effort for me to move on Mars than it did on Earth.

VOA: special.2010.07.10

And once we do that, we're actually going to move on to multi-electron atoms.

在这之后，我们就可以继续多电子原子的内容。

麻省理工公开课 - 化学原理课程节选

Because once things started moving, it tends to move in that direction.

因为一旦事物开始改变，他们就会有朝这个方向运动的倾向。

麻省理工公开课 - 计算机科学及编程导论课程节选

We have, for example, bomb drills just in case something happens people think it's right When thing happens once and you move on, go back to life, just as something goes wrong and then you move on.

例如，我们有，炸弹演习以防发生什么事情,人们认为这是应该的,发生了一件事，你要继续正常的生活，正如某事出了点问题，然后你继续前行。

普林斯顿公开课 - 人性课程节选

So if we're comparing the difference between these 2 now, what you'll notice is that in nitrogen we have all half-filled 2 p orbitals, and now, once we move into oxygen, we actually have to add 1 more electron into 1 of the 2 p orbitals.

那么如果我们来比较下它们两个有什么不同，你会发现氮的，2，p，轨道,都是半满的，现在，我们继续看一下氧，我们不得不在其中一个，2，p，轨道上,再放上一个电子。

麻省理工公开课 - 化学原理课程节选

Once I do that, I can move the "s" up there.

做完了之后，我可以将，s，键移动到上面。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选