查询词典 tooth

Tooth decay begins when teeth are not cleaned properly after eating.In just one hour,plaque bacteria will start converting sugar and starch particles into harmful acids that attack the tooth enamel.Within 24hours,plaque can harden to form tartar,which can only be removed by aprofessional.Help prevent tooth decay and gum disease by cleaning away plaque at the gum line each day using Glister Multi-Action Fluoride Toothpaste and rinsing with Glister Concentrated Mouthwash.

A：进食后没有适当清洁牙齿，是蛀牙的导火线短短一小时，已足够让牙垢膜细菌把糖份及淀粉质转化为有害的酸性物质，侵蚀珐琅质24小时内，牙垢膜便会硬化，形成牙石，必需由牙医清除要预防蛀牙及牙周病，建议你每天使用丽齿健氟素牙膏，清除积聚于牙龈边缘的牙垢中国化妆品代理网膜，再以丽齿健浓缩漱口水漱口

The line,at which the tooth intersects the graduated cylinder,is an arc in the developed surface of the cylinder.The tooth profile in the middle section of tooth width is an involute.

它的特点是：轮齿与其分度圆柱面的交线在分度圆柱面所展开的矩形中为圆弧；而且在齿宽中央截面内为渐开线齿形。

AIM: To investigate the tooth wear state of permanent tooth from human samples about 3000 years ago, compare it with the state of modern people and research the evolutional rule and influential factors of human tooth wear from 3000 years ago to nowadays.

目的：调查距今约3000年前出土人牙齿的磨耗状况，并通过与当代人牙齿磨耗状况进行对比性研究，以探求3000年来人牙齿磨耗的演变规律及其影响因素。

Free radical contents of the tooth enamel in 25 children permanent tooth and 35 milktooth samples were measured by electron spin resonance technique, and the relationshipbetween free radical content of the tooth enamel and radiation dose was also investigated.

本文用电子自旋共振技术，对25个儿童恒牙和35个乳牙釉质样品中的自由基含量进行了测定，研究了牙釉质中自由基含量与辐射剂量的关系。

And the polar angle and the polar radius was represented into AutoCAD polar coordinate, the involute was drawn through the spline linear tool. And then, a section of the involute was intercepted with the diameters of the point circle and the root circle, used it as the tooth face of the spline. The involute tooth thickness was drawn using the diameter of the divided circle and the tooth-form was drawn through rotating, mirroring image and cutting.

根据DIN 3960渐开线花键的坐标值，用EXCEL函数功能计算出不同压力角下渐开线的极角和极半径，表示成AutoCAD极坐标并通过样条线工具绘制出渐开线，再用齿顶圆和齿根圆直径截取一段渐开线作为为花键齿面，并用分度圆直径绘制出渐开线齿剖面，经镜像和裁剪便可绘制出渐开线齿形。

Besides, the relationships among the tooth numbers and the helical angles of the helical type shaving cutter, the tooth surface deviations and tooth contact conditions are also investigated.

同时，本论文也根据齿面接触分析之结果探讨创成Helipoid齿轮的螺旋型刮刨刀之齿数、螺旋角与齿面差异以及齿面接触情形间的关系。

If the dial indicator reads 0.14~0.3mm , it means the tooth clearance is right; You can also use a 15~20mm long and 0.5mm thick lead sheet or "∽"-shaped fuse . Put the sheet or fuse between the unengaged tooth flanks tha is between the convex surface of small bevel gear and the concave surface of the large bevel gear. Turn the gear, then the pressed thickness of the big lead sheet end suggests the normal tooth clearance of this site.

另一种方法是用长15~20毫米，厚0.5毫米的铅片或弯成"∽"形的保险丝，放入两齿轮非啮合的齿面之间（即小锥齿轮的凸面和大锥齿轮的凹面之间），转动齿轮，则铅片在靠近大端处被挤压的厚度即为该处的法向齿侧间隙。

B The gear real tooth surface is represented by a sum of two vector function that determine the theoretical tooth surface and the deviations of the real surface from the theoretical one, and the tooth contact analysis of real surface is completed.

将实际齿面表示为理论齿面和偏差曲面之和，进行了实际齿面的轮齿接触分析。

It turned out that the previous tooth ache wasn't because of the tooth decay but wisdom tooth!

之前的牙痛并不是因为蛀牙，而是因为要长智慧牙！

Through the comparative analysis that: the arc-tooth flow of hydraulic performance is better than the arc, Adopting optimize the design parameters of the structure, reducing the flow rate of 0 regions, and strengthen vortices regions, improved irrigation arc tooth for hydraulic performance and anticlogging ability, irrigation design recommended by arc-tooth flow structure.

通过对比分析认为：弧齿形流道水力性能优于弧形流道，可以通过结构参数优化设计，减小0流速区域，强化旋涡区，提高弧齿形灌水器的水力性能与扰堵塞能力，灌水器设计中推荐采用弧齿形流道结构形式。

But Severus escaped the hands of those that Julianus had sent to murder him and sent a letter to the praetorian guard, giving them the signal either to desert Julianus or to kill him.

赛维鲁总算逃过了尤利阿努斯派来的杀手，并写了一封信给罗马的禁卫军，向他们发出信号，要么抛弃尤利阿努斯，要么干掉他。他们立即服从了。

This text is in terms of this of " human nature ", it is under the influence of western literature human nature thought to probe into, awakening in human nature of novel works and all sorts of limitations that affectionate The school of Mandarin Duck and butterfly.

本文便是从"人性"这一角度，探讨在西方文学人性思想的影响下，清末民初鸳鸯蝴蝶派的言情、哀情小说作品在人性方面的觉醒与种种局限。