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BNC: 24008 COCA: 18554
pacemaker
noun [C] /ˈpeɪsˌmeɪkə(r)/
singularpacemaker
pluralpacemakers
  1. 1
    medical a small piece of electronic equipment connected to someone's heart to help the heart muscles move regularly (心脏)起搏器
     Synonyms and related words
    Medical equipment: catheter, defibrillator, drain...
  2. 2
    someone who begins a race quickly so that the other people will follow them and run a fast race (赛跑中的)领跑者
     Synonyms and related words

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