Discoloration of the tongue, commonly white, is due to deposits of epithelial debris, effete (or worn-out) bacteria, and food.
Discoloration of the tongue, commonly white, is due to deposits of epithelial debris, effete (or worn-out) bacteria, and food.
舌头的变色物质通常是白色的，由上皮细胞的沉淀物，死亡的细菌和食物组成。