牙齿的

To evaluate the bioactivity of the glass-ceramics,the specimens were soaked in the simulated body fluid. The results indicate that fluorapatite shows needle-like microstructure, which is similar to that in human bone and teeth. The formation of needle-like fluorapatite is related to the heat treatment procedure, which results in needle-like fluorapatite crystals by accelerating one-dimension growth along the c-axis through the screw dislocation growth mechanism. The mechanical properties of the glass-ceramics are close to those of the human bone and teeth. The bioactivity test results show that apatite layer is precipitated on the materials surface after 3 d immersion in SBF, which indicates the glass-ceramics have a good bioactivity.

研究结果表明：氟磷灰石相呈针状，与人体骨和牙齿的磷灰石形貌相似，有利于提高材料的生物活性和生物相容性；氟磷灰石的形成是材料被迅速加热至高温进行热处理，使磷灰石以螺旋位错生长机制沿c轴晶化长大所致；经热处理获得的材料具有优良的力学性能，基本满足骨科和齿科用生物材料的性能要求；材料在体外模拟体液中浸泡3 d后，样品表面已有磷灰石层生成，表明该材料具有较高的生物活性。

This paper reviewed the relationship between fluoridated milk and dental caries prevention derived from the preceding academic research. Several topics, including milk fluoridation, fluoridated milk in animal and human clinical studies, the effect of fluoridated milk to fluoride concentration in saliva and dental plaque, the bioavailability of fluoridated milk, and the effect on human teeth were discussed.

本文回顾有关牛奶与龋齿间关系以及牛奶氟化以预防龋齿的文献，从牛奶氟化的最初想法，到氟化牛奶的动物实验、人类临床实验，进一步研究对唾液、牙菌斑中含氟量的影响，以及氟化牛奶的生物可得性，最后探讨对人类牙齿的抗酸溶解力的改变。

Land, they have a body length of up to 12 meters or more, the giant killer animals to eat, there are more than 100 tons of grass-weight king, a mouth to gradually grow up to 800 teeth of ancestral Taotie; sea, They have more than the existing whales, great white shark, even the King of the sea; the sky, they have wings to start up to 12 meters wide, such as air fighter jets today.

陆地上，它们有体长可达12米以上、专吃动物的巨型杀手，有体重100多吨的食草大王，有嘴里能陆续长出多达800个牙齿的饕餮之祖；海洋里，它们有比现存的鲸、大白鲨还要大的海上霸王；天空中，它们有双翼展开可达12米、宽如今天战斗机的空中斗士。

The changes have important effect on the stability of the treatment and the function of mastication.

通过牵引成骨和正畸联合矫治严重上颌后缩后，上颌骨的前移和牙齿的移动必然使上下牙的排列和咬合发生变化，而这种变化对疗效的稳定性和患者的咀嚼功能的恢复有着重要影响。

Above all, Carter's photographs depict the diversity of China , from chic young socialites to toothless derelicts, from wrestlers to karaoke girls.

最重要的是，卡特的照片描述了中国的多样性，从时髦而年轻的社会名流到没有牙齿的流浪汉，从摔跤手到歌厅女郎。

Researchers used cell-phone-like tracking devices, for example, to record the Arctic migration of narwhals, a whale with a long twisted tooth, and remotely operated submersible s to reach several kilometers down into the oceans to study delicate marine animals that are impossible to collect.

例如，研究者利用电话式的声音追踪装置来记录独角鲸的迁徙（一种长着长长弯曲牙齿的鲸鱼）；还有就是使用远程操控潜水艇潜入几千公里的海底，去研究那些无法收集的海洋生物。

Because only one of the channels controls switching, the same edge of each tooth is used for determining output signals, in both forward and reverse target rotation, with direction information available on the first magnetic edge after a direction change.

因为只有渠道之一的控制开关，每颗牙齿的相同边缘用于确定输出信号，在这两个目标正向和反向旋转的优势，与磁场方向有关资料后的首个方向的变化。

I have come to conclude that this passion for getting immediately to the plum is a complex inflicted on Western man by his delication to birthday gifting , to the sweet-toothed Easter hare, to the Christmastide thing, and all that.

我得出结论，西方人的这种想要立即知道细节的感情，是由对生日礼物、长着可爱牙齿的复活节兔子、圣诞节礼物等的微妙渴望混合造成的。

I have come to conclude that this passion for getting immediately to the plum is a complex inflicted on Western man by his delication to birthday gifting , to the sweet-toothed Easter hare, to the Christmastide thing, and all that.

我得出结论，西方人这种想要立即得到惊喜的感情的复杂的造成原因是对生日礼物、长着可爱牙齿的复活节兔子、圣诞节礼物等的微妙渴望。

We'll show you the proper way to brush your teeth and keep your smile in tip-top shape.

最受欢迎的方法是所谓的贝氏刷牙法，集中在牙齿的三分之一最接近牙龈线和牙龈本身的地方，那里是牙菌斑容易集中的地方。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。