| 单词 | pacemaker |
| 释义 | pacemakerpacemaker /ˈpeɪsˌmeɪkɚ/ noun [countable] 1medicine a very small machine that is attached to someone’s heart to help it beat regularly2a pacesetter3science, biology a part of the muscle in the right atrium of the heart which sends out a regular pattern of electrical signals that make the heart beat regularly |
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