Sure, we can alter elements by nuclear fusion or nuclear fission.

当然，我们可以通过核裂变或核聚变来改变元素的种类。

Scientists may be a step closer to sustaining nuclear fusion.

科学家可能距离实现持续核聚变又近了一步。

Nuclear fusion involves joining two or more atoms into a larger atom.

核聚变涉及到将两个或多个原子聚合成一个较重原子。

The core of the Sun is the perfect cauldron for nuclear fusion.

太阳的核是个核裂变完美的大锅炉。

Nuclear fusion, on the other hand, is what powers the Sun and stars.

另一方面，核聚变则能为太阳和恒星提供能量。

So, we now know that the Sun is powered by nuclear fusion.

现在我们知道了太阳是靠核聚变产生能量的。

Tammy Ma is among the scientists who have been chasing nuclear fusion for generations.

Tammy Ma是几代人以来一直在研究核聚变的科学家之一。

This phenomenon is responsible for the nuclear fusion that fuels the energy production of stars.

这种现象是核聚变的原因，核聚变为恒星的能量生产提供了燃料。

The assembly of the world's largest nuclear fusion device has officially started in southern France.

全球最大的核聚变装置已在法国南部正式开始组装。

In their core, nuclear fusion crushes hydrogen atoms into helium releasing a tremendous amount of energy.

在恒星中心，核聚变使氢原子压缩成氦原子，并释放出巨大的能量。

Every second, trillions of oxygen molecules fuse into helium molecules in a process called nuclear fusion.

每一秒钟，就有数万亿氧分子与氦分子发生结合。这一过程叫做核聚变。

Today you learned that the Sun is a star, powered by nuclear fusion in its core.

今天你学到了太阳是一颗恒星，由内核的核聚变供能。

Eventually, it will become so hot that it triggers nuclear fusion. And, a star is born.

最终，越来越高的温度触发了核子反应。就这样，一颗恒星就诞生了。

The enormous gravitational pressure of so much material compresses and triggers nuclear fusion in the star's core.

恒星由宇宙中最简单、最轻的元素 氢 构成由于巨大的引力。

But not enough mass to create the internal pressure and temperature necessary to have nuclear fusion.

但是没有足够的质量形成内部核融化所需要的压力和温度。

Scientists in the United States have achieved a net energy gain from nuclear fusion for a second time.

美国科学家第二次从核聚变中获得净能量增益。

However, at that point nuclear fusion no longer releases enough energy, and the pressure from the core peters out.

并支持它们快速燃烧 最终变为铁或镍，然而 当核聚变不再释放能量时。

At the same time, its hot center continues to make helium from existing hydrogen through the process of nuclear fusion.

与此同时，其炽热的中心继续通过核聚变过程从现有的氢中产生氦。

Heat and radiation from the nuclear fusion generates a stellar wind, sweeping away most of the loose matter in the disc.

核反应发出的热和辐射引发了恒星，风将“原星碟”中的大部分松散物质吹走。

It was still ridiculously hot, like the core of a star, but it's at those temperatures that nuclear fusion can occur.

它的温度仍然高得离谱，就像恒星的核心一般，但正是在这样的温度下，核聚变才可能发生。