First thing, I will begin with comments about the test.

第一件事，我将以考试的评论开始。

麻省理工公开课 - 固态化学导论课程节选

But I want to begin today with another passage, from the war years, and ask now from a Northern point of view, how do we get to Uriah Parmelee?

但是今天我要以另外一篇文章做开始,自开战那年,从北方角度来看,我们要如何理解乌利亚·帕米利

耶鲁公开课 - 美国内战与重建课程节选

So, that is a tricky problem to begin with because if you take this formula here, it tells you y if you know t, but no, we're not saying that.

以这个问题刚开始的时候有点难度,因为如果你要用这个公式,求y的时候就一定要知道t,但是,我们不知道

耶鲁公开课 - 基础物理课程节选