In the 30 years since Open University was established, an important lesson has been learned by people.
在开放式大学成立后的30年里，人们得到了一条重要的经验。
Open your window, and, yes, you are bound to admit a few flies; but the main lesson of recent British history is that fresh air is good for you.
打开窗，是的，必定会有几只苍蝇飞进来，但是英国近代史给我们最主要的经验是：新鲜的空气有益健康。
Lesson Six Excuse me, can I open an account here?
第六课请问，开账户是在这儿吗？
Justin: Yes, but I learned a lesson. Never open my door without looking.
贾斯汀：对啊，但我学到了一个教训。在还没看清楚是谁之前，千万别开门。
Then, teacher to one-to-one teaching, but the previous lesson is open for parents and children will do is to observe!
接着，老师进行一对一的教学，但是前几次课是为家长开设的，而孩子所要做的就是观察！
Therefore, it's very necessary to open a psychological lesson to college students, helping them get through this period smoothly.
因此，向大学生开设心理课程是有必要的，能够帮助他们顺利度过这一时期。
Can we skip the lesson and have an open conversation class today?
我们可以跳过今天的讲课，做开放式对话吗？
Open the exhibition reading activity outside the lesson.
开展课外阅读活动。
Let that irony be a lesson to you: Never open an attachment, even from a friend, unless you've been told to expect it.
从这个讽刺中吸取点教训吧：千万别打开附件，就算是朋友的邮件也不可以，除非你事先得到通知。
Please open your book to lesson 11.
请翻到第十一课。
To experience the culture of middle east, we have gather the famous teacher to open the basic lesson for Arabic, 45 Lesson, small class only cost 2000 RMB.
感受中东文化，体验不同生活。现有阿拉伯语初级学习班开班，名师教学，开班灵活，小班上课，45课时人民币2000元。
Each 60-minute session will involve a "transfer drill" and then some open time for questions and answers on a previous lesson tip.
在60分钟的课程中，先是推杆重心转移训练，然后是针对上节课的提问时间。
Open your books and let's study Lesson One.
打开书本，我们来学习第一课。
Open your books and let's study Lesson One.
打开书本，我们来学习第一课。
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