在我们的社会生活中,经常会看到这样一群社会生活群体,他们或是靠街边卖报为生的报贩,或是靠为长途客运拉客为生的女子,或是靠站在酒店门口迎宾为生的男子,或是靠卖水果为生的小摊贩。他们的职业虽各不相同,但他们每天都在重复着相同的话语:“你好”、“谢谢”、“欢迎 In our social life, we often see such groups of social life groups who rely on the streets to sell newspapers for newspaperrs or for the sake of long-distance passenger soliciting tourists or standing by the hotel door Welcome to a living man, or a small vendor selling fruit. Although their careers vary, they repeat the same words everyday: ”Hello “, ”Thank you “, ”Welcome