那个男孩总是打架惹事，被大家公认为是个麻烦制造者。

That boy often gets into fights and is known as the ___trouble-maker in the neighborhood.

那个男孩总是课堂上捣乱，老师说他是个麻烦制造者。

The boy always disrupts the class, and the teacher says he's a ___trouble-maker.