helium
英 [ˈhiːliəm]
美 [ˈhiːliəm]
n. 氦; 氦气
Collins.1 / BNC.17116 / COCA.11819
牛津词典
noun
- 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.
柯林斯词典
- 氦
Heliumis a very light gas that is colourless and has no smell.
英英释义
noun
- a very light colorless element that is one of the six inert gasses
双语例句
- 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。 - We have a helium nucleus and one electron.
我们有一个氦核和一个电子。 - 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。 - Helium and neon are inert gases.
氦和氖为惰性气体。 - So, helium plus is a one electron system.
所以氦正离子是一个单电子系统。 - 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。 - 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。 - 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。 - 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。 - 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。