To retire after achieving great success or accomplishing a major task, often implying a voluntary withdrawal from the limelight or a position of influence once one's mission is fulfilled.
老校长在任期内将学校建设得有声有色，到了退休年纪，他便选择功成身退，将重任交给了年轻一代。
The old principal, having built the school into a thriving institution during his tenure, chose to retire after his success was accomplished, entrusting the important responsibility to the younger generation.
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