牙医可能会决定拔掉那颗牙,以免反复发作。A dentist may decide to extract the tooth to prevent recurrent trouble.牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。When not removed, plaque causes tooth decay and gum disease.餐后要刷牙,而且每天要使用牙线清洁牙缝。Brush your teeth after each ...
Suddenly she dropped the quill as a wild happiness flooded her.她突然感到一阵无限的快乐,当即丢开了手里的鹅毛笔.The Chicago River flooded the city's underground tunnel system...芝加哥河的河水淹没了城市的地下隧道系统。It was not easy to drain the flooded mine....