Structural changes of dental enamel , dentine, cementum and pulpal reactions in carious process are discussed.其中,釉质龋的研究资料最为丰富, 其次是牙本质, 有关牙骨质龋的资料最少.Suitable for cutting metal , such as structural steel refractory steel, c...
Storms have caused structural damage to hundreds of homes.几场暴风雨毁了成百上千所住宅，连结构都破坏了。We had taken great pains to check the structural soundness of the coachwork.我们下了很大的工夫检查汽车车身的结构是否安全。Trimeris'compound , called T - 20 ,...