蛀牙: 1. cariosity2. decayed tooth Tooth decay; urban decay.蛀牙;城市的衰落I have three cavities.我有三颗蛀牙。I think I have a cavity.我想我有蛀牙。Brushing your teeth regularly helps to ward off tooth decay.按时刷牙有助于预防蛀牙。My bad tooth worries me.我的蛀牙使我痛苦。Yes, you have a big cavity there.你有一个大大的蛀牙洞。He had a bad tooth pulled out yesterday.昨天他把蛀牙给拔掉了。Sugar can decay the teeth.糖能蛀蚀牙。Decay of a bone or tooth, especially dental caries.骨头腐烂,牙蛀蚀骨头或牙齿的腐烂,尤指牙蛀蚀A pitted area in a tooth caused by caries.蛀洞因龋齿引起的牙内蛀洞区