bring down
  降低,使下降,使洩氣
  bring down
       v 1: move something or somebody to a lower position; "take down
            the vase from the shelf" [syn: lower, take down, let
            down, get down] [ant: raise]
       2: cause the downfall of; of rulers; "The Czar was overthrown";
          "subvert the ruling class" [syn: overthrow, subvert, overturn]
       3: impose something unpleasant; "The principal visited his rage
          on the students" [syn: inflict, visit, impose]
       4: cause to come to the ground; "the pilot managed to land the
          airplane safely" [syn: land, put down]
       5: cause to be enthusiastic; "Her playing brought down the
          house"
       6: cut down on; make a reduction in; "reduce your daily fat
          intake"; "The employer wants to cut back health benefits"
          [syn: reduce, cut down, cut back, trim, trim down,
           trim back, cut]