reaction [rıˈækʃən] 名词
单语范例（未经PONS编辑处理）
Producing a fission chain reaction in natural uranium fuel was found to be far from trivial.
en.wikipedia.org If k is less than 1, the chain reaction is "subcritical," and the neutron population will exponentially decay.
en.wikipedia.org With enough uranium, and with pure-enough graphite, their pile could theoretically sustain a slow-neutron chain reaction.
en.wikipedia.org These ions and electrons in turn strike more atoms, creating more positive ions in a chain reaction.
en.wikipedia.org Thus was born the practical nuclear chain reaction by the mechanism of neutron-induced nuclear fission.
en.wikipedia.org 浏览词典
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