Vertically means that every class connected to the next class is connected to every class throughout the semester around a spiral.

纵向意味着每一节课都和下一节课有关系,和整个学期内的每一节课都有关系，呈一个螺旋状。

哈佛公开课 - 幸福课课程节选

We talked about mitosis last time; it's described more completely in the chapter, where two cells are formed from one.

我们上节课说到过有丝分裂,在那一章里更详细的阐释了,细胞是怎么由一生二的

耶鲁公开课 - 生物医学工程探索课程节选

There will be a review session for those of you who care to come given by myself in 26-100 tomorrow night starting at 7 pm going until the last question is answered.

有一节复习课给那些关心的人,我亲自来上,明天晚上7点开始,这将持续到最后一个问题被解决。

麻省理工公开课 - 固态化学导论课程节选

.. Ok, so... I think I don't need to explain to you why there is one lecture in the semester that I don't teach and Sean will teach it.

好的，那么。,我想我不需要跟你们解释,为什么这学期有一节课不是我教而是Sean教的。

哈佛公开课 - 幸福课课程节选