To respectfully decline an invitation or task, often citing one's own incompetence or inability; to beg to be excused.
公司经理邀请他主持新项目，但他敬谢不敏，认为自己经验尚浅，无法胜任此重任。
The company manager invited him to lead the new project, but he respectfully declined, believing he was not experienced enough to handle such an important responsibility.
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