Water 水
Water keeps your throat and lips moist and prevents your mouth from feeling dry. Dry mouth can cause bad breath and/or an unpleasant taste — and can even promote cavities. 水可以保持喉咙和嘴唇湿润，防止口干。而口干会导致口气和（或）不快味觉，甚至可以导致蛀牙。
