英语释义
1. one that sets the pace for another
2. one that takes the lead or sets an example
3. a group of cells or a body part (such as the sinus node of the heart) that serves to establish and maintain a rhythmic activity
4. an electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart
5. a small electrical machine put inside a person to make the heart beat evenly
6. a group of cells or a body part (as the sinoatrial node of the heart) that serves to establish and maintain a rhythmic activity
7. an electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart — called also pacer