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一口重水，或者说氧化氘，又称D2O。

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”恒星区别开来。

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

当体内约有三分之一的水中含有重氢时，大鼠和小鼠都会死亡。

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”。

Specifically, the ratio of deuterium to hydrogen to helium.

具体来说， 是氘与氢与氦的比例。

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

其中之一，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.

然后另一个氢原子与氘结合形成氦 3。

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——氢的一种同位素，含有两个中子，具有放射性。

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。