We spent the first half of the semester,you might say, trying to get clear about the metaphysical facts.

我们将前半学期花在，试着弄清楚那些形而上学的事实。

耶鲁公开课 - 死亡课程节选

These sorts of questions will occupy us for roughly the first half of the semester.

这些问题将会大约占到,这学期的前一半时间。

耶鲁公开课 - 死亡课程节选

So that's what we are going to focus on, and you will find out that the laws of physics for this entire semester certainly can be written on one of those blackboards or even half of those blackboards.

这就是我们的课程重点,而且你将来会发现,整个学期的全部物理定律,最多也只能写满一块黑板,或者半块黑板

耶鲁公开课 - 基础物理课程节选