上课、开会或者约会迟到是很不礼貌的。
It's not polite to be late for classes, meetings, or appointments.
填写承诺的时间，如吃饭，睡觉，开会，开会，上课等。
Fill in committed time such as eating, sleeping, meetings, meetings, classes, etc.
我的笔记本上面都是上课的笔记和开会的记录。
My notebooks are filled with notes from classes I take and notes from meetings.
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