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Concretely, firstly with Timoshenko beams, the fundamental formulae of solutions of dynamical equations, boundary conditions and initial conditions have been transformed by Laplace transformation. Secondly, in the Laplace regions , we gain the analytical solutions of impact forces at the impact contact points, shear and maximum inverse stress of beams. Then, by using Durbin numerical inverse method, we gain the numerical solutions of Timoshenko beams under various restriction conditions. Moreover, the graphs about impact forces at the impact contact points, shear and maximum inverse stress of beams can be obtained too.

把Timoshenko梁力学模型动力学方程的基本解形式、边界条件以及初始条件进行Laplace变换，在Laplace区域得到了冲击接触处的冲击力、整个梁的最大弯曲应力和剪力的解析解，然后利用Durbin数值反演的方法得到了各种约束条件下的Timoshenko梁模型时间-空间的数值解，得到了冲击接触处的冲击力、梁各处的最大弯曲应力和剪力的曲线图。

E-business systems can gang together with information flux, fund flux and good flux, over come the restriction from time and space, enlarge peoples' living field, and create new domain of market economy.

电子商务系统将信息流、资金流和物流有机地结合在一起，摆脱了时空的限制，扩展了人们的生活领域，开辟了市场经济的新领域。

Multiple meaning of expression is getting its possibility because of garble of a statement and ambiguity is constrainted because of restriction of context, same psychology and cultural background, use of figure of speech.

双向的断章一方面使赋者所表达的意义更加具体、与情境更加契合，另一方面却也使表达有着多义的可能。而具体语境的限制以及比较一致的心理、文化背景和比喻修辞的使用，又限制了歧义的发生。

It is found that the later is better than the former greatly, due to the fact that accurate solution by gaussian elimination is zero error. But zero error is ideal situation and it is difficult to reach in practice. So all we can do is to search an optimal solution under many restriction conditions, and the optimal can represent the solution of the question better.

咎其原因，高斯消元法是求解问题的精确解，而在实际生产科研工作中，这种理想状况是很难达到的，因此，遗传算法在多个约束条件下寻找当前最优解作为问题的解，才具有实际意义。

The preference for orthohydroxyphenones in the products is a consequence of the restriction experienced by the geminate radical pair.

表明四种酯都被吸附到Na-Y型沸石的超笼中，光解产生的自由基的扩散和转动受到极大的限制。

Otherwise, it also considers the restriction of joint bending moment between steel gilder and concrete girder.

基于提出的模型，将复合形法应用于索力优化中。

Example of Figure 2.11 compares the restriction maps of a -globin gene and mRNA.

当一个基因是连续的时，DNA的限制的图谱和mRNA图谱是相对应的。

Gnomic fragments of 4～20 kilobases were obtained by digesting genomic DNA of V.cholerae O 139 with restriction endonuclease Eco RI,then plasmid gene bank was constructed.

随机筛选重组克隆，获得一株可与O1 39霍乱弧菌抗血清发生凝集反应的重组克隆，命名为大肠杆菌DH5α(pMG32 0 )。

The innovations and traits of this paper go as follows:(1) The threat and restriction mechanism on the coupling relationship between urbanization and eco-environment are discussed from theory.

其中，巴南区、渝北区和江津市属于耦合较强协调区：万州区、长寿区、涪陵区和忠县属于耦合中等协调区：武隆县、巫山县和丰都县属于耦合较弱协调区：巫溪县、奉节县、云阳县和开县属于耦合弱协调区。

Mitochondria1 controlregion and cytochrome b gene of Bronze gudgeon in the lower reaches of the Yangtze River were cloned by PCR . Cloned fragments were digested by ten kinds of restriction endonucleases .

对长江下游铜鱼线粒体DNA 控制区和细胞色素b基因进行PCR扩增，扩增片段用10种限制性内切酶酶切。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。