Ⅰ “龋”字广州话点读谢谢！
龋 [qǔ]
急性龋（acute caries）：又称湿性龋，多见羡则正于儿童和青年人。龋损呈浅棕色，质地湿软，病变进展较快。
他的牙齿开始龋蚀。
His teeth began to decay.
掌握牙本质盯简龋的扩展方向及病理形态。
To grasp the direction of dentine caries expending and its pathological form.
结论：窝沟封闭能有效预防窝沟龋的发生。
Conclusion: The pit and fissure sealant have significant preventive effect on carious teeth.
龋齿,即蛀齿。俗称“蛀牙”、“虫牙” 【decayed tooth;dental caries】。
冰姐，兄悔当然系我个答案对啦，哈哈哈。