向学生展示课程概述。

Show the lesson overview to students.

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清单1是来自示范课程的示例学习概述主题。

Listing 1 is a sample learning overview topic from the pilot course.

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对于两个模块级目标，我们都建立了概述和总结主题，整个课程还有另一组概述和总结主题。

We created topics for overview and summary content for each of the two module-level objectives, and an additional set of overview and summary topics for the course as a whole.

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