lock in
  把…鎖在裡面
  lock in
       v 1: close with or as if with a tight seal; "This vacuum pack
            locks in the flavor!" [syn: seal in]
       2: place in a place where something cannot be removed or
          someone cannot escape; "The parents locked her daughter up
          for the weekend"; "She locked her jewels in the safe"
          [syn: lock away, lock, put away, shut up, shut
          away, lock up]