唾液：口腔中经常存在的黏稠、无色的液体，由水分、黏液、蛋白质、矿物盐及可分解淀粉的淀粉等组成。
Saliva: Thick, colourless fluid constantly present in the mouth, composed of water, mucus, proteins, mineral salts, and amylase, an enzyme that breaks down starches.
唾液：口腔中经常存在的黏稠、无色的液体，由水分、黏液、蛋白质、矿物盐及可分解淀粉的淀粉等组成。
Saliva: Thick, colourless fluid constantly present in the mouth, composed of water, mucus, proteins, mineral salts, and amylase, an enzyme that breaks down starches.
应用推荐