Helium is the lightest rare gas.

氦是最轻的稀有气体。

Neon, a rare gas in the air, takes only fractional percentage point of the volume.

氖是空气中的稀有气体，只占空气体积的千分之几。

Since the middle of last century, physicists have all along conducted studies on the rare gas crystals.

从上世纪中叶以来，物理学家对稀有气体晶体进行了大量研究。

Their results show that interatomic repulsive of the rare gas can be expressed by the overlap integrals.

计算结果表明该重叠积分可以用来表示稀有气体原子间的排斥势。

At present the rare gases in the vented gas of the most ammonia plants are not properly utilized in China.

鉴于我国大多数合成氨厂弛放气中稀有气体未能得到综合利用，造成资源浪费的现状。

Atomic number 18, atomic weight 39. 948, is a rare gas. 1894 by the British chemist Rayleigh and Ramsay found.

原子序数18，原子量39。948，是一种稀有气体。1894年由英国化学家瑞利和拉姆赛发现。

A fast discharge rare gas halide excimer laser with symmetric geometry pumped by glued and hot pressed capacitor is introduced.

本文介绍了一台以热压胶合双层平板电容器泵浦的对称结构快放电稀有气体卤化物准分子激光器。

In this experiment, we discuss the effect of mixture fraction on light intensity by means of put in pure Xe and rare gas mixture.

在本实验中，我们利用纯氙气及惰性气体混合来探讨混合气体比例对于光强度的影响。

The technique of soft X-ray ion chamber includes the measurement of the ion current as a function of rare gas pressure in the ion chamber.

软X线稀有气体电离室作为软X线波段绝对探测器，是通过测量光电离子流得出光谱辐射强度。

The modern vacuum technology as a practical basic skill has been used more and more widely, because it can produce rare gas and clean environment.

近代真空技术作为一种实用的基础技术，由于它提供了稀薄的气体氛围和清洁的环境条件，获得了越来越广泛的应用。

The fluorescence emission spectra of five typical triatomic rare gas halide excimers have been observed from electron-beam-excited high-pressure mixtures.

观测了五种典型的电子束泵浦高压混合气体产生的卤惰三原子准分子荧光发射谱。

The rare gas isotope geochemical analyses also support that there is a genetic association between the light rare earth element mineralization and mantle processes.

稀有气体同位素地球化学研究也在一定程度上揭示了牦牛坪轻稀土矿化与地幔过程之间存在着成因关系。

The paper deals with the ore-forming material sources on basis of study on S, Pb, H, O, C and rare gas isotopic composition, fluid inclusion and comparative analysis.

通过对峪耳崖金矿硫、铅、氢、氧、碳、 稀有气体同位素、 包裹体研究以及与区域对比分析，对金、银成矿物质来源进行探讨。

The interaction between atoms in it are very simple contrasted with the other crystals, due to the full shell structure of the electron maintained by the atoms in rare gas crystal.

由于稀有气体晶体原子保持了核外满壳层的电子结构，与其他晶体材料相比，原子间的相互作用非常简单。

A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk.

极环星系是种稀有的星系类型，它们有着几乎和银盘平面垂直，呈环形公转的大量的恒星、气体和星尘。

Even human engineers have difficulty with it, which is one reason why revolving buildings—with their need for water, sewerage, gas and electrical connections—are so rare.

就连人类的工程师，也很难处理。 这就是为什么带有水源供给，废水排污，煤气管道和电气线的旋转建筑那么稀缺的原因。

Existing lasers use media ranging from crystals doped with rare-earth elements to specific mixtures of gas and even certain sorts of semiconductors.

现有的激光器使用的介质有，掺杂有稀土元素的晶体、特定比例的气体，甚至是某些特定半导体。

Theories of gas drag also say that planets between three times Earth's mass and Jupiter's mass should be relatively rare.

法国Cassiopee实验室的天文学家亚历山大莫尔比代利(Alessandro Morbidelli)称，有关气体阻碍的理论表明在三倍地球质量和木星质量之间的行星应该相当稀少。

NOTE: The cell will need to be cleaned in very rare cases, this can happen in cases of high hydrocarbon content in the carrier gas or sample gases.

注意：检测池必须洁净方面成为一个杰出案例，这是在载气或样品气里含有高碳氢化合物容量的偶然案例。

These projects cover oil, gas and ferrous metals, non-ferrous metals and rare metals.

这些项目涉及油、气方面，以及黑色金属、有色金属和稀有金属方面。

The second part mainly has carried on the computation of the body elastic constants and the isolated single closed-packed plane of the rare-gas crystal.

第二部分是对稀有气体晶体的体弹性常数和孤立单一密排面的弹性常数进行了计算。

This paper studies the effects of rare earth elements (re) in the gas carbonitriding and puts forward a systematic proposition of the rare earth elements catalyzing mechanism.

本文研究了稀土元素在气体碳氮共渗中的作用，并系统地提出了稀土催化机理。

Oxide ion yield of the rare earth elements (REE) decreased with the increasing of RF power and the sampling depth, or with the decreasing of carrier gas flow rate.

稀土元素的氧化物离子产率随入射功率和采样深度增加，载气流速减小而降低。

It also supplies liquid oxygen, liquid nitrogen, acetylene, carbon dioxide, hydrogen, propane, freon, liquid ammonia, and rare element gas.

还兼营液氧、液氮、液氩、乙炔气、二氧化碳、氢气、丙烷气、氟里昂、液氨及其他高纯和稀有气体。

The modification of rare earth elements to palladium catalysts leaded to great promotion on both the activity and stability in selective gas hydrogenation of acrylonitrile to propionitrile.

稀土元素对钯催化剂的修饰能够极大地促进丙烯腈选择性气相加氢制丙腈的活性和稳定性。

In this paper, the rare earth catalyst of automobile tail gas purification and the method, mechanism and present research and application at home and broad are introduced.

主要介绍了稀土汽车尾气净化催化剂及其净化的方法、原理，及当前国内外对稀土催化剂在汽车尾气净化中的研究与应用现状。