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.
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.
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.
我希望你们上课前，阅读这个时已经注意到了。
I hope some of you noticed this when you were reading over this before you came to class.
琳达发现的，并在上课前把它交来了。
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.
在每堂课上课前，需读完该课标注中的阅读资料。
上课前两小时不能进食，课后半小时方可少量进餐。
Don't eat anything two hours before the class and you may eat little half an hour after the class.
玛丽清楚的知道她应该在每次上课前阅读布置的作业。
Mary knows very well she should read an assignment before every lecture.
一天早上上课前我的物理老师走到我的寄物柜前，让我去他教室。
One morning my physics teacher walked up to me at my locker before school and asked me to step inside his classroom.
妈妈通常在晚上备课，但我知道有些老师上课前才备课。
My mother often prepares for her lessons at night, but I know some teachers prepare their lessons just before their classes.
下午上课前我经常和同学们玩游戏。我们下午上两节课。
In the afternoon I often play games with my classmates before class begins. We have two classes in the afternoon.
课前，参加培训的同学准时来到教室，做好上课前的准备。
Pre-class , the students participate in the training on time went to a classroom to make preparations before class.
我敢保证今天你们中几乎所有的人来上课前一定都会使用表。
I'm sure that almost every one of you looked at watch or clock before you came to class today.
昨天上课前，她走到爱德华先生的讲台前说：“早安，吉姆。”
Yesterday, before class starts, she walk up to Mr. Edward's desk and goes, ‘Good morning, Jim.’
有时会有同学在早上上课前来找我帮忙解答数学或科学作业的问题。
Other students would sometimes come to me in the morning before school to ask for help with their math or science homework.
这需要反复的阅读和再阅读，所以我建议你们在周一来上课前，要读七十五遍。
It repays innumerable readings and re-readings, so I urge you to read it seventy-five times, let's say, before you come to class on Monday.
学生如因病或事请假，迟到或早退，请在上课前或后通知该班老师。
Students requiring a leave of absence, late or early dismissal are urged to inform their teachers before or after classes.
重要的是，在上课前做完伸展运动，在运动时活动肯定会耽误课程。
It is important that stretching is done before class, during class and most definitely after class.
课程内容经常互相引用，在开始上课前务必确认看过所有课程内容。
Please make sure to look at all the sections before starting, as material is cross-referenced very often.
这些摘要包括接下来课程中的材料。学生在上课前要阅读这些摘要。
These summaries cover the material in the up-coming class session. Students are urged to read the summary before coming to class.
好好规划时间，以免你无法及时在上课前冲洗好幻灯片并携带至课堂。
Plan your time so that you have a roll of slide film developed in time for class.
你的鞋子可以是一个简单的一双凉鞋，以便您可以上课前的步骤进行。
Your footwear can be a simple pair of sandals so that you can step out of before class.
在你完成最佳初稿后，请至少在上课前一天，复印一份给同组的组员。
After you have written your best draft, distribute a copy to each member of your editing group at least one day before class.
特别重要的是，上课前学生要确实阅读应用阅读材料和准备讨论问题。
It is particularly important that you do the application readings and prepare any discussion questions BEFORE CLASS.
此外，如果你未提前预习当天的课堂讨论，无论什么理由，请在开始上课前通知我。
Also, please notify me at the beginning of the class if, for whatever reason, you are unprepared to participate in class discussion that day.
此外，如果你未提前预习当天的课堂讨论，无论什么理由，请在开始上课前通知我。
Also, please notify me at the beginning of the class if, for whatever reason, you are unprepared to participate in class discussion that day.
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