They are made up of hydrogen and helium.

它们是由氢和组成。

Releasing helium balloons into the sky is now banned in the Australian state of Queensland.

澳大利亚昆士兰州现在禁止向天空放飞。

It's just a giant ball of hydrogen and helium gas.

它只是一个巨大的氢和的。

However, the largest mass leaks are associated with hydrogen and helium.

，最大的质量减少与氢和有关。

Here, individual hydrogen nuclei can be used to form helium… a process that releases energy.

在这里，单个的氢核可以用来形成… … 释放能量的过程。

You're not going to be able to fly with the helium balloons.

用飞不起来。

We were flying these toy helium balloons before the Disney Pixar film " Up."

在迪士尼皮克斯的电影《飞屋环游记》之前，我们就在飞这些玩具。

We have three days, at best, before the helium leaks out of those balloons.

我们最多有三天时间，不里的就漏光了。

Suddenly, helium is converted into carbon, releasing a lot of energy.

突间，转化为碳，释放出大量能量。

Besides hydrogen and helium, the air there is about 2% methane.

除了氢和，其空中还有2%的甲烷。

Next up, a helium filled floating mode of transportation.

接下来要介绍的是一种利用做能源进行漂浮飞行的方法。

Yes, helium, just like those birthday balloons.

是的，就是生日派对上里用的那种。

It ended when the first stars started fusing hydrogen into helium.

当第一批恒星将氢融合为时，黑暗时代结束了。

Hydrogen and helium are the rest of my atmosphere.

我的大层主要由氢和组成。

Stars are mostly made up of hydrogen, with smaller amounts of helium and other elements.

恒星主要是由氢和少量的及其他元素组成。

Jupiter's atmosphere is made up mostly of hydrogen and helium.

木星的大层主要由氢和组成。

There's some helium and traces of heavier elements.

太阳中含有和少量较重的元素。

Atoms of elements got broken down into smaller ones like neon and helium.

成分中的原子被分解成更小的原子，如氖和。

Since its June 5th liftoff, Starliner has experienced at least five helium leaks.

自6月5日升空以来，星际客机至少发生了五次泄漏。

5 imperial gallons of the liquid helium. 5 You know how much helium that is?

英制加仑的液态氮你知道那是多少氮吗？