And each step in the fusion process happens faster than the one before it.

聚变过程中的每一步都比前一步快。

In this fusion process, the resulting atom is slightly less massive than the ones they created it.

在这个聚合过程中，新产生的原子质量比原来产生的原子质量稍微小一点。

Unlike all the elements that went before, the fusion process that creates iron doesn't generate any energy.

然而，与以往的元素不同，形成铁元素的聚变过程不会产生任何能量。

The energy created in the fusion process is carried out of the core by particles of light and heat called photons.

聚变产生的能量送出太阳的核心是靠光和热的粒子，叫做光子。

The fusion process releases a lot of heat but very little radiation.

聚变过程释放大量热量，但辐射很少。

Chapter 2: The Fusion Process Unpacked The primary fusion process in the Sun is the proton--proton chain.

第二章：聚变过程揭秘 太阳中的主要聚变过程是质子——质子链。

The key is, though, that they've been able to release more energy from the reaction than they use in the fusion process itself.

但关键是，与在聚变过程中使用的能量相比，他们能够从聚变反应中释放更多的能量。

To understand how hugely remarkable this is we can compare this  to the nuclear fusion process that powers the sun and all stars.

要了解这有多么了不起，我们可以将其与为太阳和所有恒星提供能量的核聚变过程进行比较。

The key is though that they've been able to release more energy from the reaction than they use in the fusion process itself and that's critically important.

关键是他们已经能够从反应中释放出比在聚变过程中使用的更多的能量，这是至关重要的。

There are other fusion processes as well, like the carbon--nitrogen--oxygen (CNO) cycle, which also produces helium and energy but uses carbon, nitrogen, and oxygen as catalysts.

还有其他聚变过程，例如碳-氮-氧（CNO）循环，它也产生氦和能量，但使用碳、氮和氧作为催化剂。