| 单词 | 系统活动 |
| 释义 | 〔parasympathetic〕parasympathetic activity; parasympathetic agents.副交感神经系统活动；副交感剂〔biotin〕A colorless crystalline vitamin, C10H 16N 2O 3S, of the vitamin B complex, essential for the activity of many enzyme systems and found in large quantities in liver, egg yolk, milk, and yeast. 生物素：无色结晶维生素，C10H 16N 2O 3S，属复合维生素B，为多种酶系统活动必不可少的物质，并在肝、蛋黄、牛奶和酵母中发现大量该物质 |
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