物质粒子

A popular candidate for CDM is the neutralino, for which the self-annihilation cross-section is large.

冷暗物质的一个流行的候选者是中性超对称粒子，这种粒子的自湮灭截面非常大。

It shows that the thermionic emission current can be influenced by the temperature, the work function, the diameter of the surplus RE particleand the electric field. The "nanometer particles" theory modification concentrates mainly on two parts. First, the active layer was described.

对"纳米微粒子"发射模型进行两方面的完善：其一、描述了表面活性物质层是非连续的薄膜；其二、当稀土氧化物晶体中的氧缺位浓度超过临界值的时候，即开始有纳米稀土粒子的形成和生长。

The axion is extremely lightweight with neither electric charge nor spin, so it hardly interacts with the universe's surrounding matter — that's if the particle even exists .

轴子是极其轻微的粒子，既没有电荷也不旋转，因此它几乎不与宇宙间任何周围的物质发生相互作用——当然是说如果这种粒子的确存在的话。

The laser granulometric analysis method can replace traditional methods due to its reliability. granulometric analysis ; correlation study ; the South Yellow Sea

沉析法适用于粒径小于0.063mm的物质，此法存在着检测速度慢、重复性差、对非球型粒子误差大、不适用于混合物料(即粒子比重必须一致才能较准确)、动态范围窄等缺

From the previous research result it can be found that fine particle congregates most of the nocuous matter of aerosol.

以往的研究表明，细粒子富集了大气气溶胶中的大部分有害物质，它可以进入呼吸系统并沉积于肺泡，严重影响人类健康，并且是导致环境恶化的重要因素，因此，对细粒子的研究越来越得到人们的重视。

Accordingly, many have suggested that the particles that make up dark matter interact with one another like molecules in a gas, generating a pressure that counterbalances the force of gravity.

因此许多天文学家认为，应该是组成暗物质的粒子与其他的粒子发生交互作用，产生的压力抵消重力所致。

The magnetic carboxymethylated chitosan-Fe3O4 nanocomposites were synthesized by one-step enwrapping method in which the magnetic Fe3O4 nanoparticles prepared via a modified co-precipitation method were enwrapped directly by carboxymethylated chitosan.

首先采用改进的共沉淀法制备四氧化三铁磁性纳米粒子，然后通过一步包埋法，将磁性纳米粒子用天然多糖物质－羧甲基壳聚糖直接进行包覆，制备出羧甲基壳聚糖磁性纳米复合物。

In high energy heavy ion collisions, the suppression of the yield of final state high transverse momentum hadrons is considered to be a important signal of exiting Quark-Gluon Plasma. In the process of Nucleus-Nucleus collisions, hard scattering is on the initial stage.

这种相变的发生是由于以相对论速度飞行的高能重离子在相互发生碰撞的过程中，巨大的粒子动能被沉积在核-核碰撞的有限区域内，并转化为热能，形成极端高温高密环境，迫使强子体系解禁闭，形成QGP新物质形态，并最终转化为末态粒子的产生。

In the "indirect" process, first observed in neutral kaon particles in 1964, quantum mechanics allows particles to change into their antiparticles and back again in a process known as "mixing". In 2001, The BaBar team, working at the Stanford Linear Accelerator -- and independently the Belle collaboration at the KEK laboratory in Japan -- were the first experiments to detect this in a B meson. BaBar observed "direct" CP violation in 2004 by showing that the number of decays observed for B mesons was higher than for their antiparticle equivalents.

在&间接&过程中，量子力学允许粒子在一种被称为&混合&的过程中，在自身与其反粒子之间相互转变。1964年人们第一次在中性K介子上观测到这种现象。2001年，在斯坦福直线加速器中心工作的BaBar研究组和另一个日本高能加速器研究中心的Belle研究小组各自独立地第一次在实验中观测到这种现象发生在B介子上。2004年，BaBar小组观测到了&直接&电荷宇称不守恒，他们发现观察到的B介子的衰变数量要高于其对应的反物质。

A suspension of finely divided particles in a continuous medium in which the particles are approximately5 to5, 000 angstroms in size, do not settle out of the substance rapidly, and are not readily filtered .

胶质在一连续介质中被细微分开的粒子形成的悬浮状态，粒子尺度约5至5，000埃，不会很快从该物质中分离，也不易被滤出

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。