And this is the same periodic table that you're going to get in your exams, so it's good to practice doing your problem-sets with that periodic table so you're not relying on having the double check right there of seeing what the electron configuration is.

这也是你们考试时会用到的相同的表,这样你们就不会，所以使用周期表来做问题集,是很好的练习,这样你们就,不会依赖于再次确认,电子构型是什么了。

麻省理工公开课 - 化学原理课程节选

So that is this Sunday at 7:00 p.m. Check the website under "problem sets" for its location.

这周日晚上7：00，核对下“习题集“下面的,网站中的地址。

哈佛公开课 - 计算机科学课程节选

So, I have to check for that, but nine times out of ten there's not going to be a problem so now let's do this.

所以，我需要做一个检查,但是通过十有八九,这不会出现问题，现在我这样处理。

哈佛公开课 - 计算机科学课程节选