The earliest one is at 9:00, the latest one is at 4:00.And,again, we are trying to balance the occupancy there so that we have good access to the recitation instructor.

早点的是在9点，晚点的是在4点，还有，我们正试着平衡人数,这样我们就能很好地,与背诵课的老师沟通了。

麻省理工公开课 - 固态化学导论课程节选