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。
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?
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。
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.
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.
从前她常在上课时画每个人的滑稽相。
She used to draw funny pictures of everybody during lessons.
不要把你所有的时间花在上课上。
如果他头痛，他就叫他妈妈在上课时间带他去看病。
If he had a headache, he asked his mother to take him to the doctor during school hours.
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.
星期三上午11点，该学生与49岁的哈维在上课时发生争执。
The pupil became involved in an argument with Harvey, 49, during the lesson, at 11am on Wednesday.
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.
研究调查了108名13- 16岁的学生，一部分人在上课和做作业时嚼口香糖，另一部分不嚼。
The study involved 108 students, aged 13 to 16, who split into those who chewed gum during class and homework, and those who did not.
上图所展现的是1940年5月，位于美国加利福尼亚州圣华金河谷的一所学校里，七、八年级的学生们在上课的情景。
This photo shows seventh and eighth graders at a school in the San Joaquin Valley of California in May 1940.
我经常得在上课的前一天晚上备课，为了不打瞌睡，我的很多工作都是距离我们房子一个街区的埃尔姆街餐馆里完成的。
I often had to prepare my lectures late in the evening before the day I delivered them. To stay awake, I did a lot of my work at the Elm Street Diner, about a block away from our house.
匆匆忙忙穿过校园，大家都在上课，而我却在外面。我想起了上一次，逃离古代历史课的那一天，想起那时的自己，内心一阵柔软。
Hurrying across campus, outside when most everyone else was in class, I thought of the day I'd left Ancient History and felt a tenderness toward my earlier self.
在上课的同时进行这个项目，意味着做出仔细的安排，并且在相当多的时候工作到深夜，而我们也逐渐了解果蝇研究界服务方面的门道。
Working on the project in parallel with our classes took careful juggling and quite a few late nights as we got to grips with the ins and outs of services in the world of fruit fly research.
第二天早上，包耐尔家的孩子们全然没了上学的心思，她们急着要在上课铃响以前让每一个同学都知道她们的玩具小屋，她们要在同学们面前大讲特讲，大吹特吹。
The Burnell children could hardly walk to school fast enough the next morning. They burned to tell everybody, to describe, to - well - to boast about their doll's house before the school-bell rang.
另外一些学校只要小学生们不在上课时间使用，允许他们携带手机入校。但是多数学校还是希望孩子们在每一堂课开始之前，把那些电子装备暂时存放在储物柜中或收好在袋子里。
Others allow pupils to carry phones if they do not use them during the school day, but most expect electronic equipment to be deposited in lockers or put in zipped bags at the start of each lesson.
另外一些学校只要小学生们不在上课时间使用，允许他们携带手机入校。但是多数学校还是希望孩子们在每一堂课开始之前，把那些电子装备暂时存放在储物柜中或收好在袋子里。
Others allow pupils to carry phones if they do not use them during the school day, but most expect electronic equipment to be deposited in lockers or put in zipped bags at the start of each lesson.
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