一族

The paper induces and analyzes research method of the tooth, including Method line of the tooth theory,Envlopment theory, Camus theory, Circling cluster theory and so on.Based on the past theories,the new measure to deduce the chain wheel tooth equation of roller chain at high speed,Circling cluster and envlopment theory,is proposed by analyzing basic concept of equidistant curve and Willis theory.Following the presentation of drawing lessons from traditional roller chainof the change of stanza line distance. A new type of roller chain at high speed is given in the paper.The paper studies deeply structural characteristics, the change of stanza line distance,separation between plank and bore and so on.According to design requst of roller chain at high speed and the study ofH_y--V_0 tooth chain,the impossibility that Quasi-conjugage engagement theory isrealized by the engagement of roller chain at high speed from the aspect of theory is decribed.

作者综述了高速滚子链国内外研究现状，并进行了以下研究工作：归纳分析了齿形法线法理论、包络法理论、卡姆士定理、圆族法理论等齿形研究方法，在此基础上，结合齿形啮合基本定律，分析了等距曲线的基本概念，提出了一种推导高速滚子链链轮齿廓方程的新方法—圆族包络法；在借鉴普通变节距滚子链的基础上，本文提出了一种新型的高速滚子链链条，深入研究了高速滚子链链条结构特性及其变节距、板孔中心分离等特性。

But as one breed of hitchhiker vanished into folk legend, another kind has appeared.

不过，一种便车族变成民间传奇走入历史，另一种便车族应运而生。

Months come down everybody live in peace with each other, one day suddenly the boss calls two man-eater to the office to tongue-lash:"Do not let you eat a person not to let you eat a person, still eat, you will go to work tomorrow again!"

三个月下来大家相安无事，突然有一天老板把两个食人族叫到办公室大骂一顿："不两个食人族到IBM上班，老板说："绝对不许你们在公司吃人，否则我立刻开除你们！

A Native American confederacy located on the northern Great Plains, composed of the Blackfoot, Blood, and Piegan tribes.

黑脚族：一美土著人同盟，位于北部大平原，由黑脚族，布拉族，皮埃甘部落组成。

The emergency of polygyny or polygamy is the result of historical, economic and cultural conditions. It should not be analyzed with the dichotomy of advance-blindness, us-other.

一夫多妻或一妻多夫现象的产生是历史、经济和文化多种条件作用的结果，不能用先进－愚昧、我族－他族的两分法做简单化分析。

Such derivatives are prepared by reacting a kaolin group mineral with a reagent, such as, an alkali metal halide or an ammonium halide which converts the majority of the octahedrally coordinated aluminum in the kaolin group mineral to tetrahedrally coordinated aluminum.

这种衍生物是通过将高岭族矿物与一种试剂，例如一种碱金属卤化物或一种卤化铵进行反应，从而将高岭族矿物中的大部分六配位铝转化为四配位铝而制备的。

It eulogizes the never- endingspirit of the Chinese nationis strive and promotes the great unity of the Chinese nation.

本文从&中国&一词的含义、中华民族的起源、华夏族到汉族的历史演变以及历史上几次大的民族融合四方面探究华夏族的起源以及汉民族的由来；同时，以此为视点，揭示中华民族形成、发展、强大的历史发展过程，以及华夏族和汉族与其它少数民族不断融合的历史规律。

A denitrifying oxide catalyst contains one prous metal carrier, ZSM-5 zeolite directly crystallized on said carrier and one metallic iron chosen from IB family or VIII family or their mixture. Said porous metal carrier contains at least one of prous Ni-Al, Fe-Al or Cu-Al alloys.

一种含ZSM－5沸石的脱氮氧化物催化剂含有一种多孔金属载体和直接晶化在该载体上的ZSM－5沸石和一种选自ⅠB族、Ⅷ族的金属离子或其混合物，所述多孔金属载体至少含有一种多孔镍－铝、铁－铝或铜－铝合金。

Xishuangbanna Jinuo living in Jinghong County Keno Hill, about 10,000 people, nationality do not have their own native language, keno Sino-Tibetan language family of Tibeto-Burman language and Yi branch similar.

西双版纳的基诺族，居住在景洪县的基诺山，约有1万多人，基诺族没有自己本民族的文字，基诺语系汉藏语藏缅族的一种语言，和彝语支相接近。

The method solves the problems better through adopting the following technical proposal that: the method takes the solid super acid consisting of the VIB group elements or the VIB group elements and the IVB group elements in the periodic table of elements and loaded on a symbiosis molecular sieve as catalyst, and naphtha with the component being C4-C10 as a raw material so as to carry out catalytic cracking reaction at a temperature of between 550 and 700 DEG C, under a pressure of between 0.01 and 0.5 MPa, at a reaction weight space velocity of between 0.1 and 4 hours and with the weight ratio between water and naphtha of between 0.5:1 and 4:1, thereby generating ethylene and propylene.

本发明涉及一种催化裂解制乙烯丙烯的方法，主要解决现有催化裂解制乙烯丙烯催化剂的使用温度高，活性低，乙烯丙烯选择性差的问题，本发明通过使用在共生分子筛上负载由元素周期表VIB族元素或VIB族元素和IVB族元素组成的固体超强酸作为催化剂，以组份为C 4 ～C 10 的石脑油为原料，在反应温度为550～700℃，反应压力为0.01～0.5MPa，反应重量空速为0.1～4小时-1 ，水/石脑油重量比为0.5～4∶1的条件下，进行催化裂解反应生成乙烯丙烯的技术方案，较好地解决了该问题，可用于催化裂解制乙烯丙烯的工业生产中。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷