helium

After hydrogen, the atom with the simplest structure is that of helium.

在氢元素之后, 氦的原子结构最简单.

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Hydrogen might be depleted with some of it turning into helium.

氢可能被耗尽,一部分变为氦.

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Alpha particles are positively charged helium nuclei obtained from natural radioactive decay.

α粒子是从天然放射性蜕变得到的带正电的氦核.

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Some white dwarves4 have almost pure hydrogen or helium atmospheres, but this star has an atmosphere unusually high in the heavier element, carbon.

一些白矮星的大气中几乎只有纯氢或氦，但这颗星的大气中重元素碳的含量异常高。

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During 1982 to 1984, the LEST Foundation finished the possibility research, made a conceptional telescope design, carried out the experiments of helium filling and wind tunnel testing for the telescope tube and suggested a detailed financial budget with a total amount of 25 million US dollars.

自1982年到1984年，LEST基金会完成了可行性研究、方案设计，做了镜筒充氦和风洞试验，并提出了一个总额为2500万美元的财政预算。

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Most big balloons are now filled with helium.

现在许多大气球中充的是氦气.

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The Criterion of the Unstable Thermonuclear Reaction in the Helium Burning Shell of a Thermal Pulsation AGB Star

AGB星氦燃烧壳层源出现非稳定热核反应的判据

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Verifications and design of the remote control on 10MW high temperature gas cooled test reactor helium circulator are described in this paper.

简要描述了清华大学10MW高温气冷实验堆的氦循环风机远距离控制系统的设计与调试概况。

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The bizarre behavior of superfluid helium has attracted many able theorists.

超流体氦这些异乎寻常的行为吸引了许多有才干的理论物理学家.

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Based on vacuum pumping accompanied with throttling process, presenting several superfluid helium cooling cycles and analyzing their flow principle and cooling characteristic.

以抽真空与节流相结合为基础，给出了几种超流氦冷却循环方式；

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Helium is a very light gas.

氦是一种非常轻的气体。

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Helium is a gas used in balloons.

氦是一种用于气球的气体.

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Numerical study of thermodynamic properties of helium-3 in low temperature region

氦-3低温热物性数值研究

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The loop uses high-temperature helium as the thermal source and in full scale to simulate the 30% generator load for two-phase flow stability verification test under various conditions: inlet sub-cooling degree, outlet steam pressure, flow rate and inlet resistance.

实验系统用高温氦气作为热源，采用1∶1全尺寸模拟，进行了30%负荷工况两相流稳定性验证实验、入口过冷度、蒸汽出口压力、流量及入口阻力对两相流稳定性影响的研究。

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Experimental study of thermal wave in superfluid helium ⅱ

超流氦中的热波实验研究

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Helium is a noble gas.

氦气是惰性气体.

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Some balloons are filled with hydrogen, some with helium.

有的气球是用氢气充填的，有的则用氦气。

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Helium Leak Test of Titanium Pressure Vessel

钛制压力容器的氦泄漏试验

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Helium and neon are inert gases.

氦和氖为惰性气体.

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Alpha particles -- helium nuclei -- were being hurled through the tube, in which an artificial mist had been created.

粒子 —— 氦核 —— 正通过试管被抛出, 从而在试管中形成人造迷雾.

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Study on Relation between Anomaly of Helium Emission of Thermal Water Well at Xiaxian, Shanxi, and Exploitation of Groundwater

山西夏县热水井逸出He异常与地下水开采关系的研究

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The helium-3 apparently became trapped when the earth was formed.

显然,当地球形成时,氦 - 3就被圈闭了.

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A fountain of helium spurt out of the tube.

有一股氦的喷泉从小管中喷出.

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The discovery also explains why helium is found in radioactive mineral deposits.

这个发现也解释了为什么在放射性矿渣中找到了氦.

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Considering the heavy element ( including helium and metal element) diffusion, we construct the stellar structure models of ε Eridani.

考虑了重元素（包括氦元素和金属元素）扩散效应之后来构造εEridani恒星的平衡结构模型。

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Helium and neon measurements provide further evidence that the earth was not completely melted.

氦和氖的测定,提供了更多的关于地球并非全部熔融的证据.

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Optimum coupling of interfacial thermal resistance at low temperature in space superfluid helium

空间超流氦中低温界面热阻最佳热耦合研究

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The final liquid ratio of superfluid helium by vacuum-pumping accompanied with throttling process is 90.3%, and the complexity and the cost of the equipment is similar to the vacuum pumping plan.

抽真空及抽真空与节流过程相结合的方案最终获得的超流氦液体率分别约为100%、90.3%。

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Unlike helium-4, it cannot be produced by radioactive decay.

与氦 - 4不同之处是, 氦-3不能由放射性衰变产生.

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Atoms of hydrogen are fused to make helium.

氢原子可熔合成氦。

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