氦是一种很轻的气体。
氢变成氦的时候会释放能量。
太阳一类的恒星在其核心将氢聚变成氦。
Stars like our sun fuse hydrogen in their cores into helium.
氦是一种用于气球的气体。
地球上氦的减少将对社会产生重大影响。
它含有非常少的氢和氦。
所以你是说，氦最初是在太阳上被发现的。
So you are saying that Helium was discovered on the sun first.
应该有一个监管机构确保氦的使用是谨慎的。
A regulatory agency should ensure that helium is used carefully.
氦是钍和铀元素数千年放射性衰变的副产品。
Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
政府通过出售氦不仅可以偿还债务，还可以减少总体债务。
By selling the helium, the government can not only pay off that debt but reduce its overall debt as well.
另一个重要的特性是氦的独特沸点，比其他任何元素的沸点都低。
Another important attribute is the unique boiling point of helium, which is lower than that of any other element.
事实上，银河系中24%的元素质量是由氦组成的，这使它成为宇宙中第二丰富的元素。
In fact, 24 per cent of our galaxy elemental mass consists of helium, which makes it the second most abundant element in our universe.
然而，通过光谱学测量，宇宙中氦的数量表明，宇宙中重子的数量要比基于星系光度所估计的要多得多。
However, the amount of helium in the universe, as measured by spectroscopy, suggests that there are far more baryons in the universe than estimates based on galactic luminosity indicate.
现有的所有氦供给应该被保存下来，并且只有在获得许可的情况下才能释放，医疗用途优先于其他商业或娱乐需求。
All existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands.
首先，所有现有的氦供应应该被保存下来，并且只有在获得许可的情况下才能释放，医疗用途应优先于其他商业或娱乐需求。
Firstly, all existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands.
无论市场价格，国家氦储备局将在2015年之前清算其氦资产。
National Helium Reserve to liquidate its helium assets by 2015 regardless of the market price.
那么氦原子核的电荷量是多少呢？
他证实了，阿尔法粒子就是氦核。
And there he was able to identify the alpha particle as the helium nucleus.
由于太阳风，月壤充满了氦。
The moon's lunar soil is chock-full of helium reserves, thanks to the solar wind.
星体燃烧了核内的氦，吞并了行星或伴星吗？
Did the star ignite helium at the core, swallow a planet, or swallow a companion star?
如果氦原子失去了一个电子，我们得到了什么？
阿尔法粒子是氦核，它们是放射性衰变的产物。
Alpha particles are these helium nuclei, and they are the result of radioactive decay.
我们有一个氦核和一个电子。
但是氦- 3并不是月球能够提供的唯一的资源。
But helium-3 isn't the only resource the moon might have to offer.
在所有元素中，氦的沸点最低，只有4.2 K。
聚变后形成氦以及一种称为“中子”的亚原子粒子。
They would form helium and a subatomic particle, called a neutron.
自此之后，美国成为世界上最大的氦供应国。
The United States has provided the majority of the world’s supply ever since.
随后一罐罐的氦- 3就被送至地球用于核聚变产能。
Canisters of the harvested helium-3 are then sent to Earth to be used to generate fusion energy.
机器为铜线圈充电，形成一个弱磁场，使得氦原子旋转。
The machine's electrified copper coils generate a weak magnetic field, causing the helium atoms to rotate.
就像大部分其它恒星一样，太阳主要由氢构成，其次是氦。
Just like most other stars, the sun is made up mostly of hydrogen, followed by helium.
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