fusion

Nuclear fusion powers the sun and other stars by combining hydrogen nuclei to form helium under extreme pressure.核聚变在极端压力下将氢原子核结合成氦，为太阳和其他恒星提供能量。

Commercial nuclear fusion reactors could provide virtually unlimited low-carbon energy if the technical challenges can be overcome.如果能够克服技术挑战，商业核聚变反应堆可以提供几乎无限的低碳能源。