helium

noun

1. 氦；氦气
   a chemical element. Helium is a very light gas that does not burn, often used to fill balloons and to freeze food.

1. 氦
   Helium is a very light gas that is colourless and has no smell.

1. Helium is a very light gas.
   氦是一种非常轻的气体。
2. Helium is a gas used in balloons.
   氦是一种用于气球的气体。
3. 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。
4. Within it is a bright blue cloud that seems to contain only hydrogen and helium.
   该星系里面是一个似乎只包含氢和氦的亮蓝色星云。
5. 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。
6. So, it has an atmosphere of light-weight elements: hydrogen and helium.
   因此，它的大气层由重量很轻的元素：氢和氦构成。
7. A noble gas such as helium or neon; noble metals include gold and silver and platinum.
   惰性气体，如氦和氖；贵重金属包括金、银和铂。
8. Technically, the helium's rotational inertia decreases.
   用专有名词来说明，就是氦的转动惯量降低了。
9. And I got balloons with the helium in them.
   我买了氦气球。
10. We have a helium nucleus and one electron.
    我们有一个氦核和一个电子。
11. This paper introduces a temperature acquisition system that can accurately measure and control the temperature of liquid nitrogen and liquid helium.
    从硬件和软件上设计了一套可以精确测量和监控液氮温度和液氦温度的温度采集系统。
12. The control system for the pressure control in the helium dewar is designed and simulated.
    最后，设计了制冷机停机工况下液氦杜瓦的压力控制系统并进行了动态仿真。
13. Gaseous helium is used as an inert shielding gas in metal arc and laser welding.
    在金属电弧和激光焊接中气态氦用作惰性屏蔽气体。
14. Jupiter, Saturn, Uranus, and Neptune are primarily hydrogen and helium.
    木星，土星，天王星以及海王星的大气主要是氢和氦。
15. The deuteron can fuse with another proton to make a helium 3 nucleus.
    氘核可以和另一个质子聚合以生成一个氦3核。
16. A nebula an interstellar cloud of dust, hydrogen gas, helium gas and plasma.
    星云是由尘埃、氢气、氦气和等离子体构成的星际云团。
17. 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。
18. 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。
19. A helium atom weighs less than the four original hydrogen atoms.
    一个氦原子的重量不到四个原始氢原子。
20. The planets 'strong force of gravity holds huge amounts of hydrogen and helium gas.
    行星的巨大引力吸引了大量的氢气和氦气。
21. If helium loses on electron, what do we have?
    如果氦原子失去了一个电子，我们得到了什么？
22. 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。
23. Helium and neon are inert gases.
    氦和氖为惰性气体。
24. This design reduces heat leak and vaporization of liquid helium during transportation.
    这种设计减小了运输过程中的热泄漏和液氦的蒸发。
25. And then we have gas cooled reactors which can use supercritical carbon dioxide or helium.
    然后我们有气体冷却反应堆，那能使用超临界二氧化碳或者氦。
26. Examples of unusual material stored in salt caverns include hydrogen and anhydrous ammonia, and helium.
    盐穴中储存的异常物质还包括：氢、无水氨和氦。
27. Determination of true relative density of coal by helium replacement method was researched in this paper.
    就氦气替换法测定煤的真相对密度进行了研究。
28. Venus Express has detected oxygen, hydrogen and helium ions-remnants of early oceans-escaping into space.
    金星快车已经发现了逃逸到太空的氧，氢和氦离子，他们是早期海洋的残留物。
29. So, helium plus is a one electron system.
    所以氦正离子是一个单电子系统。
30. I am helium raven and this movie is mine.
    我是氦气的渡鸦，这电影是我的。

noun

1. a very light colorless element that is one of the six inert gasses

   Synonym:    Heatomic number 2