First of all, it will only be a minute or two at a time, maybe once or twice a lecture.

首先，每次只有一两分钟，一堂课最多不超过两次。

哈佛公开课 - 幸福课课程节选

But it could be that we only grasp the forms in this life for the very first time.

但也可能是我们有生以来,第一次了解到形式。

耶鲁公开课 - 死亡课程节选