lay down the law
明確規定或表達某種規則或要求
用于上級強制制定規則
英文釋義
to assert one's authority or establish rules and expectations
例句
The manager laid down the law: no more personal calls during work hours.
典故來源
源自法律術語，指法官或權威人士正式宣布法律條文，后泛指強制規定規則。