But, while the fusion process has produced some power (16 million watts of it, to be specific), scientists have yet to create a self-sustaining fusion “burn.” Indeed, unlike nuclear fission, which went from the laboratory to the power grid within two decades, fusion has proved a tough nut to crack.
不过，虽然聚变过程产生了一定能量（具体来讲是1，600万瓦特），科学家们还没有成功完成能自我持续的核聚变“燃烧”过程。事实上，不同于在短短二十年中就完成了从实验室向电网过渡的核裂变，核聚变这块骨头要难啃得多。