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。

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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。

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Lesson Six Excuse me, can I open an account here?

第六课请问，开账户是在这儿吗？

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"It is a lesson to many countries to open up and have far more cultural exchange and make that a priority for diplomacy.

VOA: special.2010.06.21

Scott is changing both what teachers teach and how they teach it, through the creation of free and open resources, including curricula, lesson plans, and video documentation drawn straight from the classroom.

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But it has also spawned an important lesson in designing challenges and open innovation projects.

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The other lesson is to just be insanely open, and realize there will always been conspiracy theorists whom you will never convince.

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