课时的英文：
class
period
- In class;at class
在上课时 - Comparative Study on the Unit Integrity Teaching and Class Period Teaching
单元整体教学与课时教学的对比分析 - It'll take us two periods to grasp these.
这些需要我们两课时才能掌握。 - It’ll take us two periods to grasp(master) these.
这些需要我们两课时才能掌握 - Did you take notes at the lecture?
你听课时做笔记吗? - Tom was caught nodding during the history class.
汤姆上历史课时被发现在打瞌睡。 - He tried to constrain himself from a cough during the lecture
讲课时他设法忍住不咳嗽。 - In Earth science classes, our teacher makes us grade each other's papers.
上地球科学课时，老师让我们同学之间互相改卷子。 - He came to class high on drugs.
他来上课时因吸了毒而显得神智恍惚。 - When I attended his lecture, I always tried hard to strangle yawns.
我上他的课时，总是竭力地制止自己打呵欠。
n. 班级；阶级；种类
v. 分类；把…分等级
adj. 很好的
- It is a step class.
这是踏板操训练班。 - The class dismissed.
下课了。 - The class teacher sectioned the class for dialogues.
老师把班级分组进行对话练习。 - The class teacher dismissed the class on time.
教师按时下课。 - A second - class letter is slower than a first - class.
二类信比一类信件慢。
n. 时间；时期；周期；经期；课时；局；句号
adj. 某一时期的；当时特有的
- juvenile period
幼年期(构成中心木质部的一段时期) - But this is a transitional period.
但这是个转变过程。 - The period includes the legal period and the period designated by the people's court.
期间包括法定期间和人民法院指定的期间。 - We'll call this time period the translation period.
我们称这个时间周期为转化时期。 - In this period, the cost would be enormous.
在这期间，就会损失惨重。