Yellow jackets number among the 900 or so species of the world's social wasps, wasps that live in a highly cooperative and organized society consisting almost entirely of females--the queen and her sterile female workers.
Yellow jackets (主)number(谓) among the 900 or so species of the world's social wasps, wasps that live in a highly cooperative and organized society consisting almost entirely of females--the queen and her sterile female workers. number可以做动词讲