知识贝壳
知识贝壳
所属栏目：汉英中兽医
Yin is regarded as the prerequisite for the existence of yang.In the animal body,the functional activities(yang)rely on essences(yin)as their material bases,hence the saying“yang can not develop by itself.” ......（本文共 179 字 ） [阅读本文] >>