贫富差别 in poor areas: 在贫穷地区differences between means: 两个平均数间的差数expressing differences between people: 表示人与人之间的不同some of the areas in the west are poor: 西部的一些地区很穷gap between the rich and the poor: 贫富差距; 贫富鸿沟下载手机词典可随时随地查词查翻译