To trade official positions or noble titles for money or personal gain, indicating a corrupt system where appointments are bought and sold.
那个家族的衰败始于其成员沉迷于卖官贩爵，只顾一己私利，最终导致了众叛亲离的结局
The decline of that family began when its members indulged in selling official posts and trafficking in noble ranks, caring only for their own self-interest, eventually leading to being abandoned by all.
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