功率的激增引起了反应堆的链式反应，反应堆的堆芯燃烧起来。
A surge of power caused a chain reaction that set the reactor core on fire.
为使链式反应刚好能够维持下去，反应堆要有一个最起码的尺寸。（目的状语）
There is a minimum size for the reactor at which the chain reaction will just work.
为使链式反应刚好能够维持下去，反应堆要有一个最起码的尺寸。（目的状语）
There is a minimum size for the reactor at which the chain reaction will just work.
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