So, you didn't know at the beginning, you knew you were enrolled in the trial, they gave you a shot, you didn't know whether you were part of the real group that got the test vaccine or the placebo group that got the control; turned out that Bonnie was part of the control group.

一开始你可能不清楚全过程,你只知道你参与了一项试验,他们给你打了一针,你不知道你是属于接种了,试验疫苗的真实试验组,还是属于被注射了安慰剂的空白对照组,结果显示,邦妮属于对照组

耶鲁公开课 - 生物医学工程探索课程节选

> David: Welcome back to CS50, and welcome now that you are officially enrolled.

>，大卫：欢迎回到CS50课程,也欢迎你们正式登记加入我们。

哈佛公开课 - 计算机科学课程节选

Oh, by the way, talking about under enrolled subjects, the complementary subject offered by STS called History, Society, and Solid State Chemistry meets Tuesdays and Thursdays at 11:00 in room 2-136.

顺便说一下，关于已经选了的课，由STS开设的补充课程,历史课，社会社和固体化学课,在2-136教室的11点，在周三和周四上。

麻省理工公开课 - 固态化学导论课程节选