查询词典 backbond

Similar to the oxidation process of Si(111)-7×7 by water,the gradual insertion of S atom into Si_a-Si_s backbond is possible to occur,and the insertion pathway,which begins with directly destroying Si_a-Si_s backbonds by a foreign H_2S molecule,remains more favorable.However,when H_2S attacks at the Si_a site to split Si_a-Si_s backbond with its S or H atom,there is no distinct thermodynamical and kinetical difference between these two attacking behaviors,whereas Si_a-Si_s backbond is easilier broken when H_2O attacks at the Si_a site with its O atom.This mainly lies in the fact that the electronegativity of oxygen is larger than that of sulfur.

5类似于H_2O对Si(111)-7×7的氧化历程，S原子逐步插入Si_a-Si_s键是可以发生的，且H_2S直接打开Si_a-Si_s键进而使S原子插入的途径仍是动力学上较为有利的，但H_2S以S或H原子进攻Si_a位从而打开Si_a-Si_s键的两种反应机制在动力学和热力学上并没有表现出明显的差别，而当H_2O以O原子进攻Si_a位时，Si_a-Si_s键则较容易断裂，这应归因于O的电负性比S大。

To be blunt , he has beforehand been aware of that t he awful bacterial disease had infected his cut of the backbond, and he became so blunt that even could't beat the average player.

老实说，他早预料到，那该S的细茵病早已感染了他背部的伤口，他变得相当迟钝，甚至都赢不了水平平庸的队手。

On the one hand,PH_x(x=2,1) can insert into the Si-Si backbond at elevated temperature,and a surface Si=P or a subsurface Si_3P unit was formed via subsequent H_2 liberations.On the other hand,the PH_2 species adsorbed on the Si_r site may completely dissociate across the other two unsaturated adatoms,and P adsorbed on the Si_r site may desorb in P_2 gas form at high temperature.

一方面，在高温下PH_x(x=2，1)可插入Si-Sibackbond，继而经过脱H_2步骤形成表面Si=P单元或次表面Si_3P单元；另一方面，吸附在Si_r位上的PH_2也可能在相邻的另两个Si adatom上实现后两个P-H键的解离，在高温下，吸附在Si_r位上的P可能以P_2的形式脱附。

In this method onlydihedral angles were selected as independent variales,a proper target function was minimized by loacl-to-globular optimization,thus these dihedral angles andthe coordinates of six kinds of the backbond atoms (N,HN,Cα,IIα,C′,0) were calculated.

这种方法把肽平面之间的二面角当做独立变量，通过从局部到整体逐渐最优化的方法使适当构造的目标函数最小，计算出这些二面角，以及主链每个残基上六种原子N、H%%^^N%%^^、C%%^^α%%^^、H%%^^α%%^^、C′、O的空间坐标，绘出蛋白质分子的溶液三维结构图案，并成功地把这种方法编写成计算程序DISNMA，且以碱性胰蛋白酶抑制剂为标准结构，得到了很好的验证。

Now he worked in ajoint venture.

现在他在一家合资企业工作。

More troops in Afghanistan won't change any of the foregoing.

更多的在阿富汗的军队也不会改变之前的状况。