Stars are massive enough to fuse hydrogen into helium in their cores, generating energy.

恒星的质量足以在其核心将氢聚变为氦，从而产生能量。

Let's go check to see if the university has any helium in reserve.

我们去查查大学里还有没有氦气存货吧。

Ever since the Sun was born, it's been fusing hydrogen into helium in its core.

自从太阳诞生以来，它的核心就一直在将氢聚变为氦。

Like the Sun, stars generate energy by fusing hydrogen into helium in their cores.

和太阳一样，恒星通过核心的氢聚变成氦来产生能量。

You can't sink. With all that helium in you, you're lucky you don't float away.

你落不了，体内充满了氦气遇水不飘走就算你走运啦。

When it did, there was three times as much hydrogen as helium in the Universe.

这是，宇宙中氢的含量是氦的三倍。

When hydrogen fuses into helium in the Sun's core, the energy is released in the form of light.

当氢在太阳核心聚变成氦时，能量以光的形式释放出来。

One can make a very reasonable argument to put helium in group two for that reason.

出于这个原因，人们可以非常合理地论证将氦气归入第二组。

This is the stage of a star’s life where nuclear fusion occurs, turning hydrogen into helium in its core.

这是发生核聚变的恒星生命阶段，在其核心将氢转化为氦。

It is, moreover, very difficult to explain in any other way why there should be so much helium in the universe.

此外，很难用任何其他方式解释为什么宇宙中会有如此多的氦。

But people are like, yo, Look at him he puts helium in his voice before he sings, like you just have to laugh at yourself you know.Yeah.

但是有些人就说，哟， 你看看 他唱歌前 会在他的声音里加入氦你只需要一笑而过 你懂的 恩。

For example, for the universe to exist as it does requires that hydrogen be converted to helium in a precise but comparatively stately manner specifically, in a way that converts seven one-thousandths of its mass to energy.

比如，现在的宇宙若要存在，就要求氢以准确而较为稳定的方式--说得具体一点，要以将千分之七的质量转化为能量的方式--转化为氦。

Now, stars like our sun, which are relatively small, burn hydrogen into helium, but heavier stars of about eight times the mass of the sun continue this burning cycle even after they exhausted their helium in their cores.

现在， 像我们的太阳这样相对较小的恒星会将氢燃烧成氦，但质量约为太阳八倍的较重恒星即使在其核心中的氦耗尽后仍会继续这种燃烧循环。