我的第一节课是数学课。

My first class was math.

youdao

一节课是物理，另一节课是政治。

One is physics, the other is politics.

youdao

每节课老师都点名或者在一节课和两节课之间的间隔中点名，然后写下缺席的学生的名字。

Teachers call over each class or after an interval of one or two classes and write down the names of the absent students.

youdao

OK, this is only true for an ideal gas, and we went through that mathematically where the, with a chain rule.

这一关系只对理想气体成立，上节课我们,用链式法则推导出了这一关系。

麻省理工公开课 - 热力学与动力学课程节选

Later in the term, we'll spend part of a lecture talking about, how do we find such a test suite?

在晚些时候，我们会话一节课的部分时间,来讨论这个话题，我们怎么找到这么一个？

麻省理工公开课 - 计算机科学及编程导论课程节选

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