helium

/'hi:liәm/ uk　 词频 #11819

托福 TOEFL英语专业八级

helium 是什么意思

中文释义

n. 氦

[化] 氦

英文释义

n. 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)

helium 的真实例句

以下例句摘自真实英文文章，看看 helium 在自然语境里怎么用：

Ultra-high purity helium gas and a CID equal to 55 were used to obtain MS 2 fragmentation.

—— Habitual coffee intake shapes the microbiome, modifies physiology and cognition

As rocks weaken, their minerals release nuclides such as radon, helium and thoron into the rock's pores and cracks.

—— Measuring how stressed rocks 'sigh' before breaking could help predict geohazards

It has a mass of a few earths and emits light from hydrogen and helium, typical for hot, dusty gas.

—— Mysterious gas clouds near Milky Way's black hole now have a likely source

In the first three minutes after the Big Bang, only three elements existed: hydrogen, helium and the tiniest traces of lithium.

—— This may be the daughter of one of our universe's 1st stars. Scientists call it an 'ancient immigrant'

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