常见例句雙語例句What are dental calculus and odontolith?什麽是牙垢和牙石？Can we prevent dental calculus and odontolith?牙垢和牙石可以預防嗎？bofan6688.blog.163.comHow to remove the dental calculus and odontolith?怎樣除去牙垢和牙石呢？ 返回 odontolith