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 ,...
The manatees tamed quickly.海牛很快地被驯服.Gentle and slow moving, manatees are said to be the mythical mermaids of sailors'imaginations.海牛游动温和而缓慢, 被认为是海员遐想中富有神秘色彩的美人鱼.I pushed on through the shoal water , but now the mana...
汽车在路上转弯时放慢了速度.The automobile slowed down to go around the curves in the road.船转弯时倾向一边.The ship heeled as it turned.在一次左转弯时,车尾发生严重滑摆.The back of the car skidded on a left curve....
A ratchet mechanism transfers the thread from spool to bobbin.一种棘齿装置把线从线轴转到梭心上。On dictation equipment, a spool on which magnetic tape is wound.在口述记录设备上, 一种卷绕磁带的轴.a spool of cotton一轴棉线a spool of thread一轴线...