open up
 (v.)展開,打開,開發,揭露,開始
 open up
      v 1: cause to open or to become open; "Mary opened the car door"
           [syn: open] [ant: close]
      2: become available; "an opportunity opened up" [syn: open]
      3: make available; "This opens up new possibilities" [syn: open]
      4: open up an area or prepare a way; "She pioneered a graduate
         program for women students" [syn: pioneer]
      5: start to operate or function or cause to start operating or
         functioning; "open a business" [syn: open] [ant: close]
      6: become open; "The door opened" [syn: open] [ant: close]
      7: talk freely and without inhibition [ant: close up]