walk of life idiom
各行各业;各个社会阶层
When people talk about walk(s) of life, they are referring to different types of jobs and different levels of society.
Members of the gym include lawyers, teachers, plumbers, and hairdressers - people from all (different) walks of life. 我们这个俱乐部里有律师，有教师，有建筑工人，有理发师——各行各业的人都有。