You get nervous because you forgot to study. Suddenly the bell rings, ending the class period.

你感到紧张，因为你忘记学习了。突然铃声响起，下课了。

Limit posts or messages to once per class period or to what is necessary to provide information to students.

限制每节课能发的帖子或信息数量，或向学生提供信息所需的内容。

They listen actively to the professor for the entire class period, and they write down as much information as possible.

他们整堂课都积极听教授讲课，并尽量多写下些信息。

And finally, because we know the importance of repeated exposure for internalizing knowledge, we constructed BioDive to take place over five class periods.

最后，我们知道反复温习对于内化知识十分重要，于是设计让 BioDive 持续超过五个课时。

And, since students have several class periods per day, their other teachers can do the same if they are able to, Okoya says.

而且，由于学生每天有几个课时，他们的其他老师如果有能力也可以这样做，奥卡雅说。

She was part of a team that asked students to write one quiz question for each class period.

她所在的团队要求学生每节课写一个测验问题。

And just within a class period, you could see kids were grasping the whole point of an alphabet that hadn't ever before.

就在一堂课期间， 你可以看到孩子们掌握了字母表的全部要点， 这是以前从未有过的。

The situation was far from perfect, though. As our classes were very large, I was only able to answer a couple of questions in each class period.

不过情况却远不尽如人意。由于班大，每堂课能轮到我回答的问题寥寥无几。

A lesson could also be one period of time in a course of study in a school, whether it's a specific activity within a class period or the class period itself.

一堂课也可以是学校学习课程中的一段时间，无论是上课期间的特定活动还是上课时间本身。

As our classes were very large, I was only able to answer a couple of questions in each class period.