PROFESSOR: All right, I'm hearing a little of both, but I'm very encouraged to hear quite a few people saying sigma.

好，我听到了两种答案，但我很高兴听到不少人说sigma键。

麻省理工公开课 - 化学原理课程节选

And I remember quite clearly thinking to myself as that happened-- the whole thing lasted only a few moments-- but I remember thinking quite clearly, " "I'm going to die."

我十分清楚地记得当时自己是怎么想的-,整件事就持续了几秒钟-,但我非常清楚地记得，“我要死了“

耶鲁公开课 - 死亡课程节选