知识贝壳
知识贝壳
所属栏目：汉英中兽医
Yin and yang are opposite to each other.They keep changing with yang waxing and yin wanning or vice versa.An increase or excess of the one means a decrease or deficiency of the other.This is often used to explain pathological changes such as hyperactivity ......（本文共 275 字 ） [阅读本文] >>