a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
双语例句
1. Helium is a very light gas.
氦是一种非常轻的气体。
来自柯林斯例句
2. Helium is a gas used in balloons.
氦是一种用于气球的气体.
来自《现代汉英综合大词典》
3. 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.
来自英汉非文学 - 科技
4. 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.
来自英汉非文学 - 科技
5. 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.
来自辞典例句
用作名词 (n.)
Helium and neon are inert gases. 氦和氖为惰性气体。
Most big balloons are now filled with helium. 现在许多大气球中充的是氦气。
