These will continue to move around in the air and can infect people.

VOA: special.2009.07.14

Again, we reserve the right to move people around if we have to, just to balance load, but we want you to find something that fits your schedule rather than ours.

再说一遍，如果必要的话,我们保留转移你们的权利，只是为了平衡每节课的人数，但是我们希望你们能找到,比适合我们更适合你们时间安排的课时。

麻省理工公开课 - 计算机科学及编程导论课程节选