But there's also some differences that we need to keep in mind, and that will be the focus of a lot of the lecture today.

我们也有一个径向节点,但是这里也有一些区别，是我们需要记住的,那是今天报告的焦点。

麻省理工公开课 - 化学原理课程节选

You also need to bring a calculator, we'll be solving problems that involve calculations.

你还需要带一个计算器，因为我们会需要解一些涉及计算的题目。

麻省理工公开课 - 化学原理课程节选