基本解釋牙垢 牙積石 齒石英漢例句雙語(yǔ)例句What are dental calculus and odontolith?什么是牙垢和牙石?Can we prevent dental calculus and odontolith?牙垢和牙石可以預(yù)防嗎?bofan6688.blog.163.comHow to remove the dental calculus and odontolith?怎樣除去牙垢和牙石呢?odontolith更多例句