An experimental study of helium injection with an aerodynamic ramp injector in supersonic flow
超音速空气流中气动斜坡喷嘴喷射氦的实验研究

Being both lighter than air and nonflammable, helium is used to inflate balloons and airships.
由于既比空气轻又不可燃，氦用作充气球和飞艇。

Thousands of cubic metres of helium were pumped into the towering silver canopy of his balloon.
数千立方米得氦气被灌入高达几米得银色气球中。

Most of commercial helium is recovered from natural gas through a cryogenic separation process.
大多数商用氦是通过一种低温分离过程从天然气中回收的。

Two new methods using metastable helium atomic beam to fabricate nano structures are introduced.
介绍两种用亚稳态氦原子束制作纳米结构的新方法。

To take place. In this reaction, three helium nuclei will fuse together to form a carbon nucleus.
为止, 即把三颗氦原子核结合为一颗碳原子核。

Hydrogen to helium conversion provides the prime source of energy for stars on the main sequence.
由氢向氦得转变是主序星能量得主要来源。

To assign more than three degrees of freedom to a helium atom would lead to incorrect predictions.
认为氦原子具有三个以上的自由度，将会导致错误的论断。

This above image is the U. S. Bureau of Land Managements Crude Helium Enrichment Facility in Texas.
上图是位于德克萨斯州地质管理局的天然氦提取设施。

Open the reducing valve of helium steel cylinder and the monoblock pump of the molecular pump group.
开启氦气钢瓶的减压阀和分子泵组的直联泵。

Extremely cold cryogens such as hydrogen and helium can even freeze or solidify the surrounding air.
极低温液体，如氢和氦甚至能冷冻或凝固周围空气。

The Error Analysis of Usual Integrating Leak Detection of Helium Mass Spectrometer at Normal Atmosphere
常压累积法氦质谱检漏的误差分析

Research of Helium Mass Spectrometer Leak Detection Technology on Sealed Adaptation of the Optical Fiber
光纤密封转接的氦质谱检漏技术研究

A Report of 32 Cases of Intractable Angina Pectoris Treated by Mai Luo Ning Combined with Helium Neon Laser
脉络宁联合氦氖激光照射治疗顽固性心绞痛32例

In addition, safety shoes are recommended for those involved with the handling of liquid helium containers.
另外, 向与操作液氦容器有关的人员推荐使用安全鞋。

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。

Influence of the second sound and diffusive process on the transient heat transfer in bath of superfluid helium
第二声传热及热扩散作用对超流氦瞬态传热的影响

Helium can provide a protective atmosphere in the production of reactive metals, such as titanium and zirconium.
在活泼金属，如钛和的锆生产中，氦可以提供保护性气氛。

Combining the helium and hyperoxia slows down the frequency of breathing while making the air easier to breathe.
氦氧联用减慢了呼吸频率从而使空气更容易呼出。

Inhalation of helium in excessive amounts can cause dizziness, nausea, vomiting, loss of consciousness and death.
过量吸入氩会导致眩晕，恶心，呕吐，失去知觉和死亡。

Fire a highspeed proton at a Boron target and the two fuse together to form three helium nuclei and a lot of energy.
向目标硼发射高速质子可以生成3个氦核并释放大量能量。

Review of Research on Gas Retention Layer Material for Stratospheric Airship Envelope and Helium Permeation in Polymers
平流层飞艇囊体气密层材料及氦气透过聚合物研究现状

Effect of helium and neon laser intravascular irradiation to celebral cysticercosis cases after antiparasitic treatment
氦氖激光血管内照射对脑囊尾蚴病抗虫治疗后的作用

Helium is used for arc welding and leak detection, mostly, although NASA uses it to pressurize space shuttle fuel tanks.
第一代恒星是由氢, 氦及少量的锂构成。

The output of light and heat of the Sun requires that some 600 million tons of hydrogen be converted into helium in the Sun every second.
太阳所产生的光和热需要每秒将六亿吨氢转化为氦。