I've got here lots of flyers given to me by the director of the laboratories which will tell you which lab is the right lab for you, and they're offered many times a week. Yes?

我这里有不少小手册,实验室负责人给我的,它能告诉你该去哪个实验室,实验室在一周中很多个时间段是开放的,你说

耶鲁公开课 - 基础物理课程节选