| 单词 | normal volunteer |
| 释义 | normal volunteernormal volunteerNIHspeak A person used to study normal physiology and behavior or who does not have a condition being studied in a particular protocol, used to compare with subjects who do have the condition |
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英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。