根据世界原子能机构提供的消息，爆炸性核燃料发生被盗或者丢失的事故至少有25次。
According to the International Atomic Energy Agency, there have been at least 25 incidents of lost or stolen nuclear explosive material.
国际原子能机构(IAEA)估计世界上大约有20%的核反应堆在那些地质活跃地区运行。
The IAEA estimates that around 20 percent of nuclear reactors around the world are currently operating in areas of significant seismic activity.
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