The same ideas of critical size and critical mass apply to bombs. 同樣的臨界尺寸概念和臨界質量概念適用於原子彈。
A chain reaction can be initiated by inserting more and more fuel elements into the reactor core until the critical mass is attained. 只要在反應堆中加入越來越多的燃料並且一直加到臨界質量為止，就可以發生連鎖反應。
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