1.importance=essential role

　　2.personal relationship=socialbonding

　　3.remain=stay=keep=continue tobe=still

　　4.fault=flaw=defect=trouble=bug=virus=be something wrong with =besomething matter with

　　5.enough=sufficient = adequate =cover = meet somebody's need

　　6.intense=strong=passionate=powerful=deep

　　7.trade/commodity=business

　　8.relate to=associate with=linkto=connect to=identify with

　　9.feeling=emotional response=sensory=a sense of=passion

　　10.unappreciated=undervalued

　　11.difficult=elusive=hard=tough=easier said than done= harsh=demanding=challenging

　　12.reveal=show=demonstrate=letsomebody see=present=expose =letsomebody take a look

　　13.linguistic=language

　　14.describe=name=express=give adescription of=talk about=writeabout =give an account of=tell of

　　15.regard as=consider as