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Nuclear fusion is a type of reaction that turns one chemical element into another.
核聚变是种化学反应，可以将一种化学元素转化为另一种。
The Sun and other stars use nuclear fusion as a form of power.
太阳和其他恒星将核聚变作为一种能源。
In high enough temperatures, the nucleus of an atom can be separated from its electrons.
在足够高的温度下，原子核可以与电子分离。
The heat causes the nucleus to move very quickly.
高温使原子核快速运动。
When two nuclei come close enough to each other, they fuse, forming a larger nucleus.
当两个原子核靠得足够近时，它们就会融合，形成一个更大的原子核。
This method allows stars to convert hydrogen atoms into helium atoms, and even more complex atoms after that.
恒星可以利用这种方法将氢原子转化为氦原子，甚至更复杂的原子。
Nuclear fusion is a difficult process to replicate on Earth, because it requires a lot of heat and pressure.
核聚变在地球上很难实现，因为它需要极高的温度和压强。
However, many research groups around the world hope to find a way to use it as an energy source.
但是，世界各地的许多研究团队都希望找到一种将其用作能源的方法。
