中草药Chinese medicinal herbs 炮制processing 四气五味four properties and five tastes 清除杂质eliminating impurity 入药部分the part used for medical purpose 作用和缓mild effect 药物采集collection of herbs 发散解表relieving exterior syndrome by dispersion 收敛astringency 方剂学science of prescriptions 软坚散结softening hardness to dissipate stagnation 配伍关系compatibility 燥湿健脾drying dampness and strengthening the spleen 组成规律prescription-formulating principl