helium

英 [ˈhiːliəm]

美 [ˈhiːliəm]

n.  氦; 氦气

TOEFLTEM8化学

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
  Synonym:Heatomic number 2

双语例句

• 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。
• 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。
• 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。
• 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。
• And I got balloons with the helium in them.
  我买了氦气球。
• 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。
• We have a helium nucleus and one electron.
  我们有一个氦核和一个电子。
• 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。
• 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。
• 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。