n.[化工]反应器，[核]反应堆，起反应的人，原子炉
Emergency cooling systems could fail and a reactor meltdown could occur.
紧急冷却系统有可能失灵，核反应堆有可能发生堆芯熔毁。
They shut down the nuclear reactor for safety reasons.
出于安全原因他们关闭了核反应堆。
the core of a nuclear reactor
核反应堆的活性区
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