The problem is that fusion involves joining two positively charged nuclei – and, as basic science shows, same-sign charges repel each other. Only at extremely high temperatures – over 100 million degrees Celsius, or almost ten times hotter than the sun – do the nuclei move so rapidly that they overcome their repulsion and fuse.
问题在于核聚变要连接两个带正电的原子核——基础科学显示同符号电荷是相互排斥的。只有在极端高温（超过1亿摄氏度）或比太阳炙热10倍的温度下，原子核的移动速度才能克服阻力实现聚合。