牙齿

Predatory black and white toothed whale with dorsal fin common in cold seas .

黑白色食肉有牙齿和背鳍的鲸；常见于寒冷的海水中。

Ron Fitzsimmons, a leader of the pro-abortion movement and Executive Director of America's National Coalition of Abortion Providers, admitted he had "lied through my teeth" in the ABC "Nightline" program in November 1995 about both the number of and the main reason for partial birth abortions.

在1997年2月，夏fitzsimmons，领导亲堕胎运动执行主任美国国家联盟流产供应他承认："我的牙齿谎称通过"入门"nightline"计划1995年11月，人数约有两部分出生堕胎的主要原因。

Sugar-free kinds are better for your teeth, but they can make your tummy rumbly, causing flatulence.

无糖的种类对你的牙齿更好，但它们可以造成胀气。

The woman set her teeth so hard that she pierced her lip with blood, beads of sweat falling from her forehead. Painfully and difficultly, she writhed flesh and fell!

她的嘴唇被牙齿咬得出血，额角上冒出着豆大的汗珠，全身痛苦地，艰难地挣扎着！

The man was thrown backward by automatic weapons fire, his eyes blindfolded and his arms tied behind his back, his skull jerked upward at the neck, his fleshless mouth gaping, his two rows of teeth stretched apart, as though in a primal scream.

自动武器枪火将他狠狠地击退，他的眼睛被蒙上，手臂被捆在背后，头盖骨被推到颈部，他的消瘦的嘴大大地张开，两排牙齿伸展开来，似乎在发出原始的尖叫。

Fluorapatite is a crystal that contains fluoride, tooth enamel than in the general composition of hydroxyapatite crystals have a stronger corrosion resistance.

含氟是晶体，其中包含比一般的羟基磷灰石晶体组成的氟化物，牙齿珐琅质具有较强的耐腐蚀性。

Fluoride to prevent cavities there are several ways: to hydroxyapatite into fluorapatite difficult to dissolve and reduce enamel in acid in the soluble; to a direct impact on dental plaque and reducing plaque organisms secrete acid capacity; accelerated by acidic substances are due to decalcification of the tooth enamel erosion and mineral parts of recharging it.

氟化物以防止蛀牙，有几种方法：对羟基磷灰石成难溶于和减少酸，可溶性搪瓷；在对牙菌斑产生直接影响，减少牙菌斑生物分泌酸能力；的酸性物质加速是由于脱钙的牙齿釉质侵蚀，它的充电矿产部分。

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。

An increasing number of studies have cast doubts on the benefits which water fluoridation can bring to the teeth.

一个越来越多的研究投下的好处是在水中加氟可以给牙齿疑虑。

Researcher Professor Gary Slade said the Australian Institute of Health and Welfare report, which was released yesterday, proed fluoridation improed teeth for life.

研究者Gary Slade教授说澳大利亚健康与福利局的报告，昨天就已经公开发表了，证实了加氟促进了终身的牙齿健康。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。