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单词
pacemaker
释义
pacemaker
NOUN
C
/ˈpeɪsˌmeɪkə/
1
a small piece of electronic equipment connected to someone’ s heart to help the muscles move regularly （心脏）起搏器
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