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Itric oxide has abundant Rydberg and valence electronic states and is one of the most studied diatomic molecules.

O分子具有丰富的里德伯态和价态，它是人们研究最多的双原子分子之一。

In the single crystal of C60 with a FCC structure,positron mainly appears outside the C60 molecule.The main annihilation space is the interspace between molecules.The calculated positron bulk lifetime in C60 is 352ps, which agrees with experiment value of 356ps in literature.In carbon nanotube bundles with different dimeters,as the diameter of carbon nanotubes increases,the main space where positron appears changes from the interspace of carbon tubes to the space inside carbon tubes,the radio between positron annihilation with valence eletrons and core eletrons becomes larger,the positron bulk lifetime in carbon nanotube increase rapidly first and come to be a constant at the end.The calculated positron lifetime of carbon nanotube with a dimeter of 0.8～1.6ns is 332～470ps,which agrees with the experiment value of 394ps.Positron annihilation has been studied in widly used compound semiconductors.

计算结果表明：在片层结构的石墨晶体中，正电子主要在石墨层间的空隙中湮没，计算出的石墨中的正电子寿命为208 pS，与文献中的实验结果215 ps符合很好；在金刚石单晶中，正电子主要在碳原子之间的空隙中存在并发生湮没，计算出的金刚石中的正电子寿命为115 ps，文献中的实验结果110 ps左右符合；在面心立方结构的C60晶体中，正电子主要在C60分子球壳内外侧及分子之间存在，C60球形分子中心正电子分布很少，正电子的湮没区域集中在C60分子之间的空隙区域，计算出的C60中的正电子寿命为352 ps与文献中的实验结果356ps相符合；对于不同管径碳米管束中的正电子分布，随着碳纳米管直径的增加，碳纳米管束中的正电子由主要在碳纳米管管间的区域出现转变为主要在碳纳米管管内中心的区域出现：碳纳米管束中的正电子与碳原子的价电子的湮没概率变得越来越大，与核心电子的湮没概率变得越来越小；碳纳米管束中正电子的湮没寿命先迅速增大，而后趋于一定值。

Therefore, when Fe2O3 semiconductor doped with acceptor impurities of Ni, the acceptor impurities ionize and lead to the increase of conductive holes in the valence band and hence enhance the conduction capability of Fe2O3 semiconductor.

因此，当Fe2O3半导体中掺入Ni受主杂质后，受主杂质电离，使价带中的导电空穴增多，增强了Fe2O3半导体的导电能力。

The doublet nature of this and other lines in the Na spectrum indicates a doubling of the expected number of states available to the valence electron.

钠光谱中的这条线以及其它线的双重性指出预期价电子可用的状态数是双重的。

According to the regulation, directional add the emission of hair the price not under the price fiducial traded 20 times a few days ago day company stock all 90% of valence. TCL group was released on July 16 increase hair announcement that day, this closing quotation price is 4.22 yuan, and pass two months drop, TCL group share price dropped 32.46%.

根据规定，定向增发的发行价格不低于定价基准日前20个交易日公司股票均价的90%。7月16日TCL集团发布增发公告当天，该个股收盘价为4.22元，而经过两个月的下跌，TCL集团股价下跌了32.46%。

The bonding parameter topologcal index of valence electron energy level is defined as Es=(1+qi).

价电子能级键参数拓扑指数被定义为：Es=(1+qi)。

Compared with the density of states of the alloying system, the increase of the structural stability of Mg-Al alloy with Sb or Bi additions attributes to an increase in the bonding electron numbers at lower energy level below Fermi level, which mainly originates from the contribution of the valence electron numbers of Mg, Mg, Al, Bi and Sb orbits.

电子态密度的分析结果进一步表明，Mg-Al系合金中相结构稳定性提高的主要原因在于：Sb、Bi合金化后，体系费米能级以下低能级区成键电子数的增多，其来源主要是Mg、Mg、Al、Bi和Sb的价电子。

The luminescence properties were investigated with PL and PLE spectra.Emission peaks were at about 450 nm.This emission was ascribed to the recombination between the sulfur vacancy-related electron trap donor having an energy level just below the conduction band and the Ag-related hole trap acceptor above the valence band.

通过发射光谱和激发光谱对产品的光学性质进行研究，发射峰位于450 nm左右，归属于硫空位相关的电子陷阱施主和银相关的空穴陷阱受主的复合；激发峰位于333 nm左右，归属于ZnS基质的带边吸收。

Learning the valence shell electron pair repulsion theory, they need to determine the shapes of simple molecules with the help of models and 3-D animations.

通过学习价电子对互斥理论，在模型和3D 动画的帮助下，构建出分子的形状。

This paper analyzes shell electron pair repulsion theory, valence-bond theory and molecular orbital theory on molecular structure of noble gas compounds.

对稀有气体化合物的分子结构分别用"价层电子对互斥理论"、价键理论"和"分子轨道理论进行了分析处理。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。