It is better to have too much courtesy than too little, provided you are not equally courteous to all, for that would be injustice.
礼貌太多总比太少好，只要你对所有人都没有同样的礼貌，因为那是不公平的。
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Courtesy
礼貌太多总比太少好，只要你对所有人都没有同样的礼貌，因为那是不公平的。