这个过程能压缩钚，并与此同时钚也会受到由钋组成的触发器散发出的中子的轰击，这样就引发了第二个阶段。
That compresses the plutonium while it is simultaneously bombarded with neutrons from a trigger made of polonium, and thus begins the second stage.
死亡事件引发了对公园动物生活状况的批评，投诉拥挤的笼子可能是一个触发因素。
The deaths have triggered criticism of living conditions at the zoo and accusations that cramped enclosures may have been a contributing factor.
警察说既然没有其他的因素导致这个地区引发火灾，落地电线最有可能触发图巴耶的火灾。
Police said fallen power lines were likely to have sparked the Toodyay blaze, since there were no other possible causes in the area.
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