分子撞击

It is shown that the C-NO2 bond of the alkyl is the weakest bond in the two class molecules.

进一步分析实验撞击感度与分子中最弱键离解能量的关系。

It is apparent that the visible Brownian motion depends on the size of the invisible bombarding molecules.

很明显，可见的布朗运动与不可见的撞击分子的大小有关。

That's exactly what they said about Mohammad Atta in Hamburg.

在汉堡，他们也是这么说恐怖分子穆罕默德·阿塔*的（*9/11事件中驾机撞击世贸北楼的恐怖分子，曾在汉堡留学

The photodissociation dynamics of cyclopropane at 157 nm excitation has been investigated using two different experimental instruments with different detection schemes.

在研究环丙烷在157 nm 光源激发下分解的实验中，两套使用不同侦测系统的交叉分子束实验装置分别被用来侦测反应中的光裂解碎片产物。其中一套是传统以电子撞击电离作为侦测系统的交叉分子束实验装置；另一则为最近刚建置完成的以 VUV 同步辐射光电离作为侦测器的交叉分子束实验装置。

It was observated that the movement of oil drop impacted by air molecule in Millikan experiment. Displacement distribution and measurement error functions accord with gaussian distribution by studying of histogram.

用密立根实验装置，观测油滴在空气分子撞击下运动，通过直方图研究说明位移分布函数φ符合正态分布，测量误差分布也服从正态分布。

In this paper, the electrostatic potentials at the midpoint of C-NO2 bond and the net electric charge on every element in nitrobenzene derivatives, nitrotoluene derivatives, nitrophenol derivatives and nitroaniline derivatives were calculated using ab initio.

根据分子结构、静电势最大值、实验撞击感度及分子中各元素所带的净电荷，对影响炸药感度的因素及DATB和TATB的特殊稳定性进行了分析。通过分析，我们发现，影响上述炸药撞击感度的因素主要有硝基、甲基、羟基和胺基。

Resultant energetic particles such as electrons and protons rain down near the Earth's poles and impact the air. The impacted air molecules temporarily lose electrons, and when oxygen molecules among them reacquire these electrons, they emit green light.

极光是由来自太阳的高能粒子冲撞地球的磁场所触发的；其结果是高能量的电子和质子在地球的极区附近撞击大气，让被撞击的空气分子短暂失去电子，如果是氧分子重新得回这些电子，就会发出绿光。

Resultant energetic particles such as electrons andprotons rain down near the Earth's poles and impact the air. Theimpacted air molecules temporarily lose electrons, and when oxygenmolecules among them reacquire these electrons, they emit green light.

极光是由来自太阳的高能粒子冲撞地球的磁场所触发的；其结果是高能量的电子和质子在地球的极区附近撞击大气，让被撞击的空气分子短暂失去电子，如果是氧分子重新得回这些电子，就会发出绿光。

The new technique exploits the tendency of some photons to adopt a corkscrewed rather than up-and-down wavelength after hitting a molecule.

新技术利用了光子的一种倾向，它们会在与分子撞击后，获得一种螺旋形的而不是上下形式的波长。

The velocity distribution function is modified for impact of molecules in a microbeam given by Kadar.

考虑到谐振微梁振动时，撞击在微梁两侧的分子数目和分子速率分布的差异，对 Kadar 等人提出的撞击微梁的分子速率分布函数做了修正。

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