按照职业划分,世界上现在主要有蓝领、白领、灰领、金领、粉领、绿领。蓝领是指从事体力劳动,并被要求穿制服的工人阶层。他们的工作服通常为蓝色,故而取名。此词来源于美国,历史可追溯到19世纪工厂的服装规定。当时工厂统一发给作业员藏青色制服,以耐久耐脏的布料制成,大部分颜色都属于深色系列。现 According to occupations, the world now mainly has blue-collar, white-collar workers, gray collar, gold collar, pink collar, green collar. Blue collar refers to the working class that is engaged in manual labor and is required to wear uniforms. Their work clothes are usually blue, so named. The term comes from the United States, dating back to the nineteenth-century garment factory regulations. At that time, the factory uniformed to the operator navy blue uniform, durable and dirty fabric, most of the color belongs to the dark series. Now