bailiwick
noun [ C ] formal uk/ˈbeɪ.li.wɪk/ us/ˈbeɪ.li.wɪk/
活动（或兴趣、知识、权利）范围
the area that a person or an organization is interested in, is responsible for, or controls
He had been commenting on matters that were, strictly speaking, outside his bailiwick. 严格地说，他一直在评论他职责范围以外的事情。