To prefer to wrong or betray others rather than be wronged or betrayed by them; to act with extreme selfishness and self-interest, prioritizing one's own benefit above all else.
他总是把自己的利益放在首位，宁我负人，毋人负我，所以很难与人建立真诚的友谊。
He always puts his own interests first, preferring to wrong others than be wronged by them, so it's hard for him to form genuine friendships.
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