素问．热论篇第三十一

plain water

plain washer

plain carbon steel

Plain Questions 60, Treatise on Bone Hollow

Plain Questions 62, Treatise on Regulating the Channels

grassland【畜牧】;grassy plain【畜牧】;steppe【地理】

ghatpot plain heavy embroidery

Plain Questions 70, Great Treatise on the Five Normal Rules