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中文When there are 5 minutes left in the course, the instructor will be prompted to decide whether to extend the class. Click the 'Extend for 30 minutes' button to delay the end of the class. Each class can be extended twice.

English当课程还剩5分钟时，会提示讲师是否进行课堂延时。点击延时30分钟按钮进行延时下课。每节课可延时两次。