More massive ones can fuse deuterium, and even lithium, but not hydrogen, distinguishing them from “normal” stars.

质量更大的恒星可以聚变氘，甚至锂，但不能聚变氢，这将它们与“普通”恒星区别。

That's why when there's deuterium in water molecules, it's about 10% heavier, and we call it “heavy water”.

这就是为什么当水分子中具有重氢时，重量会增加10%，所以我们称之为“重水”。

But I could be sipping on heavy water, or deuterium oxide, aka D2O, just as easily.

但我也可以轻轻松松啜饮口重水，或者说氧化氘，又称D2O。

Rats and mice die when about a third of the water in their bodies has deuterium in it.

当体约有三分之的水中含有重氢时，大鼠和小鼠都会死亡。

Specifically, the ratio of deuterium to hydrogen to helium.

具体说， 是氘与氢与氦的比例。

One of them, called deuterium, we'd extract from water.

其中之，称为氘，我们将从水中提取。

Then another atom of hydrogen is joined to the deuterium to form helium-3.

然个氢原子与氘结合形成氦 3。

Of the hydrogen nuclei, 26 out of every million were deuterium.

在氢原子核中，百万分之 26 个是氘。

The greater weight of deuterium causes it to behave differently in the Martian atmosphere.

更大的氘重量导致它在火星大气中表现不同。

Instead of hydrogen or deuterium, it contains tritium, an isotope of hydrogen that has two neutrons, and is radioactive.

与氢或重氢相比，它还含有氚——氢的种同位素，含有两个中子，具有放射性。

For a few minutes the particles smashed together, forming deuterium, an isotope of hydrogen, helium, and just a smattering of lithium.

几分钟，这些粒子碰撞在起，形成了氘(氢的种同位素)、氦和少量的锂。

What's amazing about deuterium is that it's stable - it doesn't decay.

氘的惊人之处在于它很稳定——它不会衰变。

The problem was, to form helium-4, you first have to form deuterium, one proton and one neutron.

问题是，要形成氦 4， 你首先必须形成氘、个质子和个中子。

Water molecules made of heavier deuterium instead of ordinary hydrogen are known, straightforwardly enough, as heavy water.

由较重的氘而不是普通的氢组成的水分子被称为重水， 直截了当。

Mice and rats die when about a third of the water in their bodies has deuterium in it.

当老鼠体大约三分之的水含有氘时， 它们就会死亡。

A third of the insects were by the end of the procedure deuterium positive.

三分之的昆虫在程序结束时呈氘阳性。

A fifth of them were full of deuterium, They had.

其中五分之充满了氘，他们有。

The 3He would be replenished by tweaking conditions to promote a side reaction that makes it from two deuteriums.

3He 将通过调整条件补充，以促进由两个氘生成的副反应。

But don't go filling up all your bottles with pure deuterium oxide, because too much will almost definitely kill you.

但不要往瓶子里倒满纯氧化氘，因为过量的话，几乎可以确定会置你于死地。

But don’t go filling up all your bottles with pure deuterium oxide, because too much will almost definitely kill you.

但是不要用纯氧化氘装满你所有的瓶子，因为太多几乎肯定会杀死你。