We're actually going to do one more clicker question to get started with today, and as we do, I'll explain something we're going to be trying today, which is a little bit of a friendly competition in terms of answering the clicker questions correctly.

我们将在开始讲授今天的课程之前,再多做一个选择题，我先来说明一下做这件事的原因，这实际上是一个,回答选择题的小比赛。

麻省理工公开课 - 化学原理课程节选