二面的

The obtained activation barrier of β-scission of 1-butene is 217 kJmol^(-1) in the reverse reaction of ethene dimerization.

反应的逆过程也就是1-丁烯在酸性分子筛表面的1-丁基烷氧化合物发生B分裂反应，计算所得相应的l-丁烯B分裂反应的能垒为217kJmol^(-1)，远高于相应的乙烯二聚反应能垒。

It was found:(1) the stability of the clusters increased with the bond number in the clusters;(2) the clusters with three dimensional geometry are more stable than ones with two decisional geometry;(3) the ionic potential of the clusters in gas phase and on the surface of the silver bromide grains are all positive, and the electron affinity are all negative.

结果表明；气相中团簇的稳定性随团簇中键数的增加而升高，三维构型的稳定性大于二维构型的稳定性；气相中Ag〓团簇的电离能都大于零，电子亲和势都小于零；溴化银颗粒表面的Ag〓团簇的电离势也是大于零，电子亲和势也是小于零。

Based on limiting the tensile strain at the bottom of the asphalt layer and the vertical compressive strain at the top of the subgrade, the suitability of layer thickness is checked by two criteria. One is controlling the maximum surface deflection under the design load, and the other is controlling the modulus ratio between adjacent unbound aggregate base and subbase layer.

该方法基于限制沥青层底的拉应变和路基顶面的压应变，采用两个准则来校核所设计的沥青层厚度的适宜性：一是控制设计荷载作用下的最大路表弯沉；二是控制相邻两个无结合料处治的集料层的模量比。

And the results indicate that the principal stress directions in study area are mainly NE-SW, and the second substage tectonic twist made the direction deflect from North to East, but the primary direction changed little; tectonic activities during the O〓～S～D stage is some violent, most of the area are under high stresses status, and rock fracture degree is correspondingly higher, as coinciding with the drill cores observation, i.

通过数值分析，模拟了塔中Ⅰ号断裂带和塔中45井三维模拟区O〓灰岩的构造应力场和应变场，结果表明：研究区主应力方向为北东～南西向，第二期的构造扭动使其由北向东发生了一定的偏转，但总的方位变化不大；O〓～S～D时期，塔中地区构造运动较强，研究区大部分处于高应力状态，岩石破裂程度较高，而岩芯观察结果也证实了这一结果，即O〓灰岩地层中早期形成的构造结构面比较发育，单个结构面的规模也较大；C～P时期，岩石的破坏程度较早期有所提高，主要表现在两个方面，一是各局部区岩石的破坏程度普遍有所提高；二是各个级别破裂区的分布范围相应地扩大了；研究区应力分布表现出明显的不均匀性，特别是剪应力，无论是O〓～S～D时期，还是C～P时期，都有很大的差异性，特别是在小断层的端部，剪应力比较集中，而且在断层的两盘，剪应力方向和大小都变化极快。

II, elucidations; the Yemanites at Jerusalem have printed with an edition of the Pentateuch from manuscripts the Arabic translation by Saadya (Jerusalem, 1894-1901), in which publication the vowel pointing above the line has been changed to sublinear pointing; Barnheim,"The Targum of Onkelos to Genesis"(London, 1896), on the text of the Yemen manuscripts.

二，阐发； yemanites在耶路撒冷有印有一个版本的pentateuch （ sefer keter不知）从手稿的阿拉伯文翻译由saadya （耶路撒冷， 1894年至1901年），其中出版元音指着上面的路线已改为线性指向；贝恩海姆" targum的昂克罗斯以成因"（伦敦， 1896年），对文本的也门手稿。

The two 8.4-meter mirrors of the Large Binocular Telescope on Mount Graham, northeast of Tucson, Arizona, can be turned to the horizontal, facing straight up into space through the observatory's open roof.

在亚利桑那州图森市东北的格雷厄姆山上，这二块8.4米的反射镜能够转动成水平状态，通过天文台打开的的屋顶，正直地面向上面的天空。

Considering that the NURBS has become a standard in CAD/CAGD, we shall investigate the approximation to the solutions of the minimal surface equation with the tensor Bezier surface and B-spline surface.

首先我们讨论极小曲面的分片线性的逼近，由于NURBS已经成为形状描述的唯一工业标准，而且极小曲面本身至少应该是二阶光滑的，因此我们讨论了极小曲面方程的Bezier和B样条逼近。

More than two years of marriage I had not been pregnant, the test results and the husband I have no big problem, doctor says could be pregnant, but is not pregnant, the doctor also suggested that Health is not on the do test-tube baby, I would like to know the situation in this respect, in vitro fertilization and artificial insemination is a concept of it?

有没有了解这个情况的姐妹？我结婚二年多了一直没怀上，检查结果是我和老公都没什么大问题，医生说是可以怀上的，但就是怀不上，医生还建议实生不行就做试管婴儿，我想了解一下这方面的情况，试管婴儿和人工授精是一个概念吗？

The high performance and high function of titanium dioxide are discussed in this paper.

本文讨论了二氧化钛高性能化和高功能化方面的问2。

You should be able to triangulate where the two points meet.

您应该能对二点见面的triangulate。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。