a gang of ,a band of ,a group of,a crowd of的区别

a gang of ,a band of ,a group of,a crowd of的区别 leader of a band a group of,a party of,a crowd of,这些都是什么? a troop of 和a group of 的用法区别 A cloud of 和A crowd of 有区别马 one of a group of a group of用法 a group of a large crowd of用法 a group of 的用法. A set of ,a group of ,a serious of 后 a form of a part of a kind of a group of a piece of