Now we can think about the fourth period, and the fourth period is where we start to run into some exceptions, so this is where things get a teeny bit more complicated, but you just need to remember the exceptions and then you should be OK, no matter what you're asked to write.

现在我们可以考虑第四周期，而且在第四周期,我们会遇上一些特例，所以事情有,一点复杂，但是你只需要记住,这些特例然后就没有问题了，无论你被要求写什么。

麻省理工公开课 - 化学原理课程节选

OK. Now, last thing about variables, and then we're going to start pushing on this, is where can you use them?

好，关于变量的最后一件事，然后我们就要，结束这个话题了，这个问题就是在什么地方可以应用变量？

麻省理工公开课 - 计算机科学及编程导论课程节选

So this, where we start at zero is not a node, is the first thing to point out.

零点不是节点，这是第一个要指出来的，当我们。

麻省理工公开课 - 化学原理课程节选

This is where, the way that we should start every problem set or ever problem.

这是我们,解决任何问题的最初一步。

麻省理工公开课 - 热力学与动力学课程节选

And where we where at the start of the 20th Century in the late 1890's is that we were at a place where there was great confidence in our understanding of the universe, and our understanding of how all matter worked.

0世纪开始讲起,在19世纪的九十年代,人们对于自己,对自然的理解,对自然所有物质,如何工作的理解十分自信。

麻省理工公开课 - 化学原理课程节选