So, what we can do is try using the classical description of the atom and see where this takes us.

用经典力学描述原子看看怎么样,我们要考虑的是一个,带正电的粒子和。

麻省理工公开课 - 化学原理课程节选

So we can do this for any final charge we have, if we have a molecule that has a charge of plus 2, then all of the formal charges should add up to plus 2 and so on.

对于任意净电荷的情况,我们都可以这样做，比如假设我们有一个带两个正电荷的分子，那么所有的形式电荷加起来应该等于正二，等等。

麻省理工公开课 - 化学原理课程节选

All right. I want to do one more extended example here., because we've got another piece to do, but I want to capture this, because it's important, so let me again try and say it the following way.

很好的问题，谢谢你,我还要带大家去看一个延伸的例子,尽管我们还有别的事情要去做，但是我还是想提提这一点，因为这很重要。

麻省理工公开课 - 计算机科学及编程导论课程节选

Now we began Lycidas with an image of a poet who could only write this poem -- this is what we were told -with forced fingers rude.

现在我们带着一个只能创作出这首诗的诗人的印象,来看这首诗,手指粗暴的用力攥着。

耶鲁公开课 - 弥尔顿课程节选

And very often what that does-- a positive emotion can take us out of this downward spiral and create an upward spiral.

很经常的是-,积极情绪把我们带出下行螺旋,形成一个上行螺旋。

哈佛公开课 - 幸福课课程节选

This just brings us back to the thought that whether or not I could still exist after the death of my body looks like it should depend on what I am. So in a minute, that's the question that I'm going to turn to.

这又带回到我们的另一个思考,我是否有可能,在我死后一直存在,这取决于另一个问题"我是谁",待会,我会谈到这个问题

耶鲁公开课 - 死亡课程节选

So, I've never heard the click-click-click-click-click, and we might bring a Geiger counter in here some time later in the semester so we can check all of you out, and hopefully we won't hear any when we do that either.

但我知道如果,你听到哒哒哒的声音，就表明你有麻烦了，我从来没听到过哒哒哒的声音,也许以后我可以带一个,来课堂上检测你们每一个人，希望我们不会听到哒哒哒的声音。

麻省理工公开课 - 化学原理课程节选

They're inside that loop-I've got the wrong glasses so I'm going to have to squint- and we've got one test which is a comparison we've got another test which is a multiplication-- sorry, not a test, we've got - another step which is a multiplication- and another step that is a subtraction.

他们在循环里面呢,我带错眼镜了所以不得不斜视-,然后我们这里有一个比较的测试,还有一个乘法的测试,-对不起，不是测试,是另外一个乘法的步骤-,还有一个减法的步骤。

麻省理工公开课 - 计算机科学及编程导论课程节选

If instead we had a positive ion, a cation, what we would have to do is subtract 1.

如果我们有一个带正电的离子，一个正离子，那我们就需要再减去一个。

麻省理工公开课 - 化学原理课程节选

You also need to bring a calculator, we'll be solving problems that involve calculations.

你还需要带一个计算器，因为我们会需要解一些涉及计算的题目。

麻省理工公开课 - 化学原理课程节选

And h with the carrot or the hat here, well, that carrot or hat tell us it must be an operator, and this is called the Hamiltonian operator.

而且带帽的H，好，这个帽告诉我们它肯定是一个算符，这个被称为哈密顿算符。

麻省理工公开课 - 化学原理课程节选