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Most of hob design for non-involute gears are nowadays taken by approximation method.For example,the normal sectional profile of hob worm therad is usually regarded approximately as its basic rack profile.Recently, some new methods have been developed in this respect but, perhaps, they appear overelaborate since the principle of spacing engagement is based on. For this reason , the paper offers a new design procedure for hob worm based on the planar engagement principle with the intention of simplific...

本文应用平面啮合原理精确设计各种非渐开线齿轮滚刀的基本蜗杆，提出并应用啮合线的投影原理从工件齿轮端截面的啮合线直接求得刀具蜗杆的端面齿形，而不必求出媒介齿条的齿形，方法很简单，还从啮合线的投影原理简明而形象地证明了一对螺旋齿轮直接啮合过程的啮合线是一条垂直于齿向的平面曲线。

The senior AND junior 大学生s weselves share their have experience acres how to overgo the difficulty we get ever met, how to adonly to the new environment dawn the new 大学生s.

高年级学生能够与新生一起舒服她们的历程：怎能克服遇到的困难，怎能适应新的环境。

The results show that the investment policy of maximizing equity value would differ from the strategy of maximizing the firm's value, and the shareholders' incentive to underinvest/overinvest would fade up with the increase of the level of old/ new debt, and that the ratio of the new and the old debt should be a meaningful measure in identifying which of the inefficient investment behaviors will occur.

通过比较企业价值最大化和股东价值最大化两种目标下投资门槛值和企业价值的差异，研究结果表明：&投资不足&和&过度投资&分别会随着旧债务和新债务的增加表现得越为严重；而新旧债务比例可以作为两种非效率投资行为的一种辨别条件。

In the speech presenting the findings of a committee headed by Nobel Prize-winning economist Joseph Stiglitz, the president said new measures are needed in the wake of the Sword of The New World Vis financial crisis, which was triggered by an overreliance on free-market principles.

萨科齐周一在巴黎大学索邦学院发表讲话萨科奇在介绍诺贝尔经济学奖得主约瑟夫·斯蒂格利茨领导的一个委员会的研究成果的演说中说，在过于依赖自由市场原则所引发的金融危机之后，需要采取新的核算指标。

Androstenedione and dehydroepiandrosterone as a new steroid material attracts people's attention because of the shortage of diosgenin resource and successful synthesis of AD by degradation of sterols. The followings were included in this thesis: 1. 24 new oxime-ether and oxime-ester compounds from AD were synthesized by cleavage of A-ring through NaIO_4/KMnO_4 oxidation, ring closure by amination, oximation with hydroxylaminechloride in C-17 position.

甾体药物的合成原料一般为薯蓣皂素、剑麻皂素、番麻皂素等，随着薯蓣资源日渐枯竭，使得甾体药物工业不得不寻求新的原料，而微生物降解胆固醇和植物甾醇合成雄烯二酮获得成功，使得AD成为新兴的甾体原料吸引了人们的注意。

A new region was nominated as "Qinling-Huaihe Region" which includes Gansu,Shaanxi,Henan,Hubei,Anhui and Jiangsu.In this new region,East Asia element is predominant,and Palaearctic element is equivalent to the Oriental element.

多元相似性聚类分析结果显示，台湾和华中关系密切于华南；内蒙古和东北区的关系密切于西北；河南、湖北、陕西、甘肃、安徽、江苏6省聚为一个&秦岭淮河区&，这个新分布区的特点是，东亚成分占优势；古北成分和东洋成分相等；古北东洋两界的分界线横贯全区。

The analysis of group component, stable carbon isotopic compositions and biomarker, and the geochemical characteristics of the oil and gas show that the oil comes from the Palaeogene and the oil reservoir is new bed-generating and old bed-storing; the gas comes from Carboniferous-Permian and the gas reservoir is old bed-generating and new bed-storing.

通过对油气族组成、稳定碳同位素组成及生物标志化合物进行油气地球化学研究，认为东濮凹陷三叠系砂岩裂缝性油藏原油来源于古近系，油藏类型为新生古储式；天然气来源于石炭-二叠系，气藏类型为古生新储式。

For this reason, a new functional surgery method, five-flap palatoplasty with rotation and advance of full thick soft palate, was designed. The new method was successful in 25 patients with cleft palate.

我们设计了一种新的功能性腭裂修复术式——软腭全层五瓣旋转推进法腭裂修复术，取得了较好的临床效果。

At the end of this papery simulation is performed on the new algorithm, and the simulation results along with the ex-ample checking computation prove the effectiveness of the new algorithm.

实验结果表明，该算法能够有效的处理遮挡、光照变化和尺度缩放等复杂情况，对目标进行准确有效的跟踪，改善了传统方法在尺度缩放等方面的局限性。

in 2003 the who mammary gland tumor new classification increased one new type - wetting quality micro papilliform tumor under the mammary gland epidermis tumor item (invasive micropapillary carcinoma, impc). impc is breast cancer's one rare type, occupies breast cancer 3%~6%.

2003年who乳腺肿瘤新分类在乳腺上皮性肿瘤项下增加了一种新的类型-浸润性微乳头状癌（invasive micropapillary carcinoma，impc）。impc是乳腺癌的一种少见类型，占乳腺癌的3%~6%。

We are in a good position to meet your requirements.

我们完全可以满足你方的需求。

We are all pervade d with a sense of disaster.

我们普遍有大祸降临的感觉。