In our first Yeats lecture, I was talking about Yeats's early development and stylistic transformation over the course of, roughly,a twenty-, twenty-five year period.

在我们讲叶芝的第一节课，我谈到叶芝的早期发展,以及他创作风格的转变，在大约20到25年的时间里。

耶鲁公开课 - 现代诗歌课程节选

So this is the first start of this.

这就是我们的第一节课了。

麻省理工公开课 - 计算机科学及编程导论课程节选

We talked about the auditory cortex the first section and maybe there are other parts of the brain that are factoring in here as well but how is it that composers send this information to let's say, our auditory cortex here?

我们在第一节课的时候谈到过听觉皮层,也许大脑的其他部分,也参与了进来,但作曲家是怎么做到把这些信息,传送到我们所谓的听觉皮层的呢

耶鲁公开课 - 聆听音乐课程节选