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.
在开会或者约会中挂着一张笑脸，人们对你的回应就会不一样。
Put on a smile at meetings and appointments and people will react to you differently.
在开会或者约会中面带笑容，人们对你的感觉就会不一样。
Put on a smile at meetings and appointments and people will react to you differently.
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