I guess the whole batch is running under 15 seconds.

我推测整组都是在15秒内跑完的。

麻省理工公开课 - 固态化学导论课程节选

Course assistants as we use the jargon are alumni of CS50 who return to the course for a couple of hours a week having taken it in prior years, to help you, the newest batch of students, one on one with office hours, with problem sets; and similarly do the CS function as they might in many courses.

课程助理用我们的行话说就是CS50校友0,他们在前几年一直都是一周回来几个小时,来帮助你们这些新生，在上机的时候以一对一的方式，帮助你们完成这些问题集,在很多其他课程中他们也是这么做的。

哈佛公开课 - 计算机科学课程节选