摘要
阐释了单宁的化学和生物学特性，并对其生理活性及其研究情况作一综述。
The paper elaborates the chemical and biological character of tannin, and sums up the researh for it about its physiological activation.
关键词
单宁
化学结构
生物学特性
生理活性
Tannin Chemical composition Biological character physiological activation
