And then we're going to try a demo to see if we can convince ourselves that the kind of calculations we make work out perfectly, and we'll do a test up here about half way through class.

然后我们将会尝试演示去看看,是否可以确信我们能够很好的,做出这个类型的计算，我们将在课程中做一个测试。

麻省理工公开课 - 化学原理课程节选

So if you really want class to make a difference in your life, it's up to you.

所以如果你真的想通过这门课改变生活，一切取决于你。

哈佛公开课 - 幸福课课程节选