I'll go and read them the riot act.

我去好好管管他们。

The riot act was an act of law that was passed by the British government in 1715.

暴动法案是英国政府在 1715 年通过的一项法律法案。

If the kids don’t settle down soon, I’ll go up and read them the riot act.

【riot】如果孩子不马上安静下来，我就会上去严厉地警告他们。