牙

Objective: To observe if there is the existence of a third root canal in the distal root of the mandibular first molar so as to avoid the clinical treatment of mandibular first molar root canal in the distal root left to provide guidance.

目的：观察下颌第一磨牙远中是否存在第三根管，以期为临床治疗中避免下颌第一磨牙远中根管的遗漏提供指导。

The wall of lased 15s or 30s were fused,removed smear layers and sealed dentin tubules.Laser's effects on middle and apical third root canals were pronouced than that of coronal third and had no damage.

结果 激光照射15秒和30秒组根管壁呈熔融状态，去除了玷污层，牙本质小管封闭和半封闭，未见对牙体硬组织的损伤。

Floss:This is essential to reduce tooth decay and gum disease.

用牙线干净牙缝：这是一种必不可少的可以减少蛀牙和牙床疾病的方法。

Dear, since to know you, I often toothache, because with you are too sweet, and will be tooth decay!

Dear，因为你知道，我经常牙痛，因为与你太可爱，并将于蛀牙！

With the development of human civilization, the degree of tooth wear decreases, but compared with posterior teeth, the anterior teeth decreases more apparently.

随着人类社会文明的发展，牙齿磨耗程度减轻，其中前牙相对后牙磨耗程度减轻更加明显。

Firstly, analysis regional features of commercial and trade development of Shaanxi, Guanzhong and southern-Shaanxi during Qing dynasty in view livestock tax and transit duty tax.

通过对明清陕西牙行的设置与牙税征收数量的分析，阐述了明清陕西市场上商品流通的大致情况，以及清代陕西关中、陕南与陕北三区商贸发展的区域差异与不平衡性。

The shape of the teeth is triangulum whose tip is the teeth cusp. The left and right teeth cusp oppose to each other forward to the pharyngeal cavity.

三角形牙齿的底部附着于腮弓上，三角形牙齿的尖即为牙尖，朝向内侧咽部，左右牙尖相对？

Results When the 1-year-old out of the first tooth after an alarming rate on the tusk.

结果当1岁出了第一颗牙以后，就以惊人的速度长牙。

It's a scrum as every tusker shoves his way to the center.

在所有长着长牙的雄海象挥舞着长牙向冰面中心推进时，冰面上乱作一团。

The tusks are really its front teeth, and people pay a lot of money for them.

它的长牙是它真正的前牙，而且人们为了得到它不惜花高价购买。

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。