中文翻译与英英解释

n.
【化学】氦。 helium-4 氦4〔氦的最常见同位素〕。

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)
同义词：He, atomic number 2,

Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table.

例句与用法

A fountain of helium spurt out of the tube .
有一股氦的喷泉从小管中喷出。

Most big balloons are now filled with helium .
现在许多大气球中充的是氦气。

Helium is a gas used in balloons .
氦是一种用于气球的气体。

Helium was discovered on the sun .
氦是在太阳上发现的。

Hydrogen might be depleted with some of it turning into helium .
氢可能被耗尽，一部分变为氦。

One safety catch in his design is its helium coolant .
这次设计中采用的一个安全措施就是使用氦冷却剂。

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。

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。

When helium is cooled to very low temperatures, it forms an astonishing liquid .
当氦冷却到很低温度时，它会形成一种奇妙的液体。

The discovery also explains why helium is found in radioactive mineral deposits .
这个发现也解释了为什么在放射性矿渣中找到了氦。