I also want to note that the end of the material today, so this last topic here, that's the end of the material that's going to be on this first exam.

我还想告诉大家，今天这些内容结束的地方，这个最后的主题，也就是第一次考试,要考到的地方。

麻省理工公开课 - 化学原理课程节选

Let's move on to the last topic in terms of this first exam, which is thinking about the idea of isoelectronic atoms, or isoelectronic ions. And isoelectronic is very straightforward, it just means having the same electron configuration.

下面我们继续讲第一次考试的最后一个主题，也就是等电子原子，或等电子离子的概念，“等电子的“是非常直接的表达，它的意思就是具有相同电子排布的。

麻省理工公开课 - 化学原理课程节选

All right, so we can go to today's notes, and in terms of the notes, what we're going to start with is finishing material that's going to be relevant for exam 1, and I told you on Wednesday that actually I'd give you some information today in terms of what you need to do to prepare for exam 1.

好，下面我们进入今天的讲义内容，而依照讲义，我们今天首先,要把第一次考试要求的最后一部分内容讲完，而且我周三曾经告诉过大家,我会在今天把一些信息告诉大家,是关于如何准备第一次考试的。

麻省理工公开课 - 化学原理课程节选