| 释义 |
pacemaker
\ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷\ noun
1.
a. : one that sets the pace for another — called also pacesetter
b. : one that takes the lead or sets an example
< ought to act as pacemaker of Europe unity — F.E.Hirsch >
2.
a. : a body part (as the sinoatrial node of the heart) that serves to establish and maintain a rhythmic activity
b. : an emergency device for stimulating the heart with an alternating current to steady the beat or to reestablish the rhythm of an arrested heart
< time it takes for the electrical impulse to travel from the pacemaker at the base of the heart — P.D.White > |