The C-H bond activation is the rate-limiting step.
C-H键活化为整个反应的决速步骤。
The reaction rate is determined by the activity of C-H bond in side-chain alkyl.
其反应速度主要取决与侧链烷基上c - H键的活性。
Drawing electron group can stabilize carbon anion, and enhance the acid of key C-H.
拉电子基团能使碳负离子稳定，也使C—H键的酸性增强。
From the spectral images, it was observed that the density of the C-H was evidently different in various conditions.
测量结果表明，各个工况下不同燃烧阶段颗粒物表面C-H键的摩尔浓度并不相同。
The peak shift and peak areas of C-H stretching vibration absorption were estimated by Fourier transform-infrared(FTIR).
红外光谱法测定角质层脂质中C-H对称和不对称伸缩振动吸收峰峰位及其峰面积；
The trend of the C-H got lower and lower, and it decreased rapidly at the starting of the combustion but slowly afterwards.
其浓度随燃烧的进行逐渐下降，并且表现出在急燃期快速降低，缓燃期和后燃期变化较小的趋势。
The entrance channel of the C-H bond activation step involves the spin cross between the singlet and triplet potential energy profiles.
C-H键活化步骤涉及势能面交叉，且自旋交叉与动力学相关。
Raman spectroscopy results showed that: the presence of electron withdrawing groups improved the bond energy of C-H in the benzene ring.
拉曼光谱分析结果证明：吸电子基团的存在使苯环上c - H的键能提高。
In addition, can also be used for organic reagent purity testing and containing various C-H key organic matter total and component measurement.
此外，还可用于有机试剂纯度检测及含各种不同C - H键有机物总量和分量的测量。
It is very important for, Geophysics and Material science to research the behavior of supercritical C-H-O fluid under high temperature and high pressure.
高温高压下c - H - O超临界流体行为的研究对地球物理和材料科学都具有重要意义。
Absorption loss due to high harmonics of C-H vibrations, the primary loss factor in PMMA POF, was analyzed and calculated. And the results were consistent with measured datas.
通过对PM MA塑料光纤中的主要损耗因素C - H谐波吸收进行了理论分析，并进行了定量计算，结果与实际测量数据一致。
This part mainly focused on the synthesis of propargylic alcohols in many methods including metal acetylides, terminal alkyne derivatives and the direct alkynyl C-H activation.
通过金属炔化物、末端炔烃衍生物和炔基碳氢活化等方法来合成炔丙醇。
Based on the analyse the structure characteristic, the software is developed with C-H-Builder, which can be applied to study the influence on the motion from dimension and tolerance.
运用该软件研究各个杆件尺寸以及偏差对机构运动的影响，从而确定下三角滑块结构双连杆双曲轴运动机构方案。
An increase in the specific surface area of the alumina pellets enhances the HCHO removal, and this indicates that the adsorbed HCHO species may have a lower C-H bond breakage energy.
氧化铝小球比表面积的增加能够促进甲醛的脱除，这表明被氧化铝吸附的HCHO分子的C-H键的解离能被有效降低。
The maximum overlap method was used to study the relationships the C-H stretching frequencies, group electronegativities and proton acidity properties and the molecular structure in the halomethanes.
本文借助最大重叠杂化轨道理论，研究了卤代甲烷系列分子的红外伸缩频率，基团电负性和质子酸度等分子性质与结构的关系。
Different feed gas ratio could produce synthesis gas of different H/C radio.
原料气各物质的比例不同，可以制备不同碳氢比的合成气。
So it looks a lot less messy if we just draw our Lewis structure like this for h c n, where we have h bonded to c triple bonded to n, and then a lone pair on the nitrogen there.
这看起来整洁了不少,如果我们把氰化氢的路易斯结构画成这样的话，这样我们就有氢与碳之间的单键和碳与氮之间三键，然后还有一对孤对电子在氮这里。
A hero named S. H. O. C. lent his Darkforce to Spider-Man in order to help him save some civilians from a vortex leading into the Negative Zone.
一位叫做“天惊”的英雄将他的暗黑力场借予蜘蛛侠以帮助他救助一些将被旋涡卷入负面空间的市民。
So, why don't you go ahead and tell me, keeping that in mind, which atom in terms of h c or n would you expect to be in the center of hydrogen cyanide?
那么，请大家来告诉我，并且记住它，你认为氢，碳和氮中哪个原子,应该在氰化氢的中间呢？
Determining the hemisphere is easy: latitude zones a, C, d, e, F, g, h, J, K, l, and m are in the Southern hemisphere, and the rest are in the Northern hemisphere.
这种确定非常简单：纬度区a、C、D、E、F、G、H、J、K、L和m位于南半球，而其余区位于北半球。
Copy the files gimppaintbrushtool (c and h) to gimpgradientbrushtool versions and rename internal references to the new tool name.
复制文件gimppaintbrushtool (c和h)为gimpgradientbrushtool版本，并将内部引用更名为新工具名称。
The function name starts with h because it combines pictures horizontally, and the next letter is c because the pictures are centered vertically.
函数名打头的h意思是水平组合（horizontally），而接下来的c表示竖直居中（centeredvertically）。
C. H. Spurgeon, the great English preacher, said, "a child who knowingly SINS can savingly believe."
英国伟大的宣教士司布真(C. H . Spurgeon)曾经说过，“一个孩子能够明白罪的时候就可以获得得救的信心。”
'I think it is C-O-L-E-H-D,' he says.
“我想是C -O - L - E - H - D吧”，他说。
In their elementary composition, the enzymes show the usual proportion of c, h, n, and s found in proteins.
从元素组成来看，酶显示出与通常蛋白质一样的碳，氢，氮及硫的元素比例。
In their elementary composition, the enzymes show the usual proportion of c, h, n, and s found in proteins.
从元素组成来看，酶显示出与通常蛋白质一样的碳，氢，氮及硫的元素比例。
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