| 单词 | pacemaker |
| 释义 | Word Frequency pacemaker(ˈpeɪsˌmeɪkə) noun 1. a person, horse, vehicle, etc, used in a race or speed trial to set the pace 2. a person, an organization, etc, regarded as being the leader in a particular field of activity 3. Also called: cardiac pacemaker a small area of specialized tissue within the wall of the right atrium of the heart whose spontaneous electrical activity initiates and controls the beat of the heart 4. Also called: artificial pacemaker an electronic device for use in certain cases of heart disease to assume the functions of the natural cardiac pacemaker |
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