servile
adjective disapproving uk/ˈsɜː.vaɪl/ us/ˈsɝː.vəl/
卑躬的;谄媚的
too eager to serve and please someone else in a way that shows you do not have much respect for yourself
As a waiter you want to be pleasant to people without appearing totally servile. 作为服务员，你应该对人友好，但不要表现出完全卑躬屈膝的样子。