WTO,CEO,R&B,CAD,CTV,PCS,IDD,FDI,JV,SEZ,FIE,TOC,CI,memo,IT,UN,UNESCO,WHO,OPEC,VOA,NY,CBS,PBS,ABC,BBS,ITT,CIA,FBI,MIT,VIP,JAL等等,具体的意思就请你自己看吧.