He speaks in a language of math and it is very important for students to be able to have hot copies so that they can take notes on the paper rather than be working very hard to copy down the equations that he used in these lectures.

他以数学语言授课,所以发给学生教学材料,是非常重要的,这样就可在纸上做笔记,而不用拼命,抄下他在课上,用到的等式。

麻省理工公开课 - 媒体、教育、市场课程节选

Otherwise, we don't have enough seats, or we don't have enough test papers and so on. By the way, on the tests, you will be getting tomorrow these handouts that you can use in working the homeworks , so when you are taking the test, you are allowed to bring in the copy of the periodic table of the elements.

否则，我们就没有足够的座位，或者没有足够的考试卷子,顺便说一下，在测试当中，你们明天会拿到这些讲义,就可以用来做作业了,当你们在做测试时，你们可以带来,元素周期表。

麻省理工公开课 - 固态化学导论课程节选