我在上课学防身术。
在上课时用玩笑话打断老师是不礼貌的。
It is impolite to interrupt teachers with jokes during class.
中国教育部宣布，学校应该禁止学生在上课时间携带手机。
The Education Department of China has announced that schools should ban students from carrying mobile phones during school hours.
我知道这听起来人尽皆知，但是我看到过一些人就在上课的时候才突然发现相机坏了。
I know it sounds obvious but I've seen a few people suddenly find the camera's stopped working right in the middle of class.
就在上课前，玛丽摔碎了她的眼镜。
值班生应该在上课前分发练习本。
The student on duty should hand out the exercise books before class.
我的生物老师怀特先生在上课前五分钟来到了教室。
My biology teacher, Mr. White, came to the classroom five minutes before the class began.
他正在上课。
当你正在上课的时候，你有没有在笔记本的空白处画过画？
When you're sitting in class, have you ever drawn pictures in the margins of your notebooks?
我忘了我在上课，直到布朗老师来到我的课桌前我才发现。
I forgot that I was in class until Ms. Brown came by my desk.
一位专家表示，在上课时间使用手机会分散学生的注意力。
An expert said mobile phone use was a distraction to students during school hours.
这会防止你在上课的头几天里迷路，并使你熟悉从一个地方到另一个地方需要多长时间。
This will prevent you from getting lost in the first few days of classes, and familiarize you with how long it takes to get from place to place.
一张照片显示，在一个农村的教室里，一些学生正在上课，在教室的泥地面上还有一些泥水坑。
One photo showed that students at their desks in a rural classroom, surrounded by muddy puddles on a dirt floor.
那些因为某些需要得带手机的学生必须取得父母和老师的同意，并且必须在上课期间上交手机。
Those who require their phones for some need must get their parents' and teachers' approval and must hand their phones over during class time.
不要把你所有的时间花在上课上。
你们手头上东西，都是我们在上课前买到的。
So, these things here that you have in your hand, is the results of my spontaneously going to staples before class.
你给他买了个喇叭？他正在上课吗？
以下列举的阅读作业必须在上课前完成。
The reading assignments listed below are what you should read before coming to class.
安娜：你还在上课吗？
我邀请你在上课的时候提问，如果你愿意的话，课后也行。
I invite you to ask questions in class or, if you prefer, after class as well.
这些男孩子不应该在踢足球，他们应该在上课。
The boys shouldn't be playing football. They should be at school.
历史老师正在上课，但是弗兰克却在想别的事情。
The history teacher is having a lesson, but Frank is thingking about other things.
在上课迟到了很多次以后，老师就下定了决心以后再也不迟到了。
After too many times being late to class, the teacher put his foot down and began to take strict attendance.
请确保在上课以前告诉你的导师你是否受过伤，或者是有其他健康上的问题。
PLEASE, make sure you tell the instructor BEFORE class if you are injured, have past injuries that need to be considered, or have any other health concerns.
我也确实在上课的时候进行了一些小山丘的攀爬练习，所以是有这样的练习的。
I did make it up a small wall during the class, so there was some climbing.
有几天在上课期间，他忽然一下子记不起一些字句，茫然地露出愧色。
Some days in the course of our lessons he would suddenly be at a loss for some word and look vacant and ashamed.
有几天在上课期间，他忽然一下子记不起一些字句，茫然地露出愧色。
Some days in the course of our lessons he would suddenly be at a loss for some word and look vacant and ashamed.
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