湮没

They even designed the states development according to the western pattern.Their bold opening action is an integral cornerstone in Chinese modernization procoss.

然而他们的尝试终因他们自身的和社会的种种原因被湮没在封建老大帝国强大的文化优越感中，没能

Annihilation: In physics, a reaction in which a particle and its antiparticle collide and disappear.

湮没：物理学中粒子与反粒子碰撞时放出能量而消失的反应。地球上最常见的湮没是电子和正电子碰撞时发生的。

Annihilation: In physic s, a reaction in which a particle and its antiparticle collide and disappear.

湮没：物理学中粒子与反粒子碰撞时放出能量而消失的反应。地球上最常见的湮没是电子和正电子碰撞时发生的。

The solar system and an antisolar system of comparable size were to combine and annihilate.

太阳系与一个大小相同的反太阳系相互结合而湮没。

Because the positron annihilation spectroscopy can directly show the information of the defects in the materials, we have measured the positron life of the gallium arsenide samples of different surface roughness. And we have discussed the effect of the surface topography on the positron life.

因为正电子湮没谱测量能直接给出缺陷的信息，我们用正电子寿命谱测量不同表面粗糙度的GaAs样品，讨论了表面形貌对常规正电子寿命测量结果的影响。

The condition of Asiatic and European tribes in this period is substantially lost.

亚洲和欧洲部落处在这一时期的情况基本上已经湮没无闻了。

This ultrasonic garbage is obviously not audible, but it can swamp the audble signal and cause the input circuitry to go into non-linear modes of operation, causing the audible signal to be somewhat distorted.

我们显然听不到这些超声"垃圾"，但它可能湮没可听范围到的信号并且让输入电流工作在非线性的模式下，进而使可听范围信号遭到某种程度的扭曲。

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。

AMOC results reveal that S parameter of three lifetime components in oxygen are all bigger than that in nitrogen atmosphere. These are probably caused by the oxygen making the spin-conversion of positronium atoms.

结合正电子寿命-动量关联谱测量结果，本工作分析了不同气氛下多孔硅样品中电子偶素湮没寿命及动量变化关系，讨论了多孔硅中电子偶素的湮没机制以及气氛对孔径计算理论模型的影响。

The longest lifetime component in PALS results is ascribed to the annihilation of positronium in cavities of PS sample. It is found that 80% of the positrons implanted in PS film have formed positronium atoms. PALS results show that the lifetime of ortho-Positronium has small value when the sample was in oxygen gas medium compared with those in other medium.

正电子湮没寿命谱测试结果表明，样品中存在长达40ns的电子偶素湮没成分，并且进入多孔硅膜层的正电子约有80%形成电子偶素，具有非常高的电子偶素产额；在氧气气氛下，由于气体导致o-Ps发生自旋转化猝灭是使多孔硅样品中电子偶素寿命缩短的主要原因。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。