And then, if we have time at the end, we'll introduce one last topic, which is isoelectronic atoms and ions.

最后，如果有时间的话，我们将再介绍最后一个主题：,等电子原子与离子。

麻省理工公开课 - 化学原理课程节选

So, to do this, what I'm going to do is introduce the topic of Lewis structures.

那么，了做到这一点，我将开始介绍,路易斯结构。

麻省理工公开课 - 化学原理课程节选

OK. We wanted to finish up that section, we're now going to start on a new section, and I want to try and do one and a half things in the remaining time. I'm going to introduce one topic that we're going to deal with fairly quickly, and then we tackle the second topic, it's going to start today, and we're going to carry on.

我们该结束这一段了，现在我们要开始新的课程，我在接下来的时间里要做1。5件事情,我首先会很快的对一个我们,要学习的课题,进行一个介绍，然后再进入第二个话题，今天我们只是开始这个话题，以后还要继续讲。

麻省理工公开课 - 计算机科学及编程导论课程节选