pace·mak·er /ˈpesˌmekɚ/
  定步速者,帶步人;標兵;起搏器;起搏點
  pace·mak·er /ˈpeˌsmekɚ/ 名詞
  起搏點,起搏器,整律器
  pacemaker
       n 1: a leading instance in its field; "the new policy will be a
            pacesetter in community relations" [syn: pacesetter]
       2: a specialized bit of heart tissue that controls the
          heartbeat [syn: cardiac pacemaker, sinoatrial node, SA
          node]
       3: an implanted electronic device that takes over the function
          of the natural cardiac pacemaker [syn: artificial
          pacemaker]
       4: a horse used to set the pace in racing [syn: pacer, pacesetter]