helio

['ˈhiːliəʊ]

noun.

[Physics] the chemical element of atomic number 2, an inert gas which is the lightest member of the noble gas series. It is obtained by extracting and liquefying air and is used in balloons, electric light bulbs, and welding torches.

[物理] 原子序数为2的化学元素，一种惰性气体，是惰性气体系列中最轻的成员。它是通过提取和液化空气获得的，并用于气球、电灯泡和焊接火炬。

1. The sun is composed mainly of hydrogen and helium.

太阳主要由氢和氦组成。

2. Helium is used as a coolant in nuclear reactors.

氦被用作核反应堆的冷却剂。

3. The balloon was filled with helium to make it float.

这个气球被充满了氦使其漂浮起来。

4. Helium has a wide range of applications in industry and science.

在工业和科学领域，氦有着广泛的应用。

5. The welding torch uses a mixture of argon and helium as a shielding gas.

焊接火炬使用一种混合物，其中包含氩和氦作为保护性气体。

synonyms:

同义词：

gas

air

argon

neon

krypton

radon

Helio is a chemical element that exists as an inert gas at room temperature. It is the second lightest element in the periodic table and has many practical applications, such as filling balloons and cooling nuclear reactors. It is also used in various industries, making it an important element in our daily lives.