So now, let's get a sodium here, and the chloride ion next to it to the point where they are touching.

所以，我们要有一个钠离子，和氯离子放在,相互接触的一个点上。

麻省理工公开课 - 固态化学导论课程节选

I don't know it positively. I'm about to give an example of this which I hope will flesh out what I'm trying to get across; let's look at a couple of passages in Saussure that may make the point.

不能主动地认识,更具体地举例来说;,我们来看看索绪尔是怎么论述这一点的。

耶鲁公开课 - 文学理论导论课程节选