The active reactor zone is a laying of graphite blocks with cylindrical fuel apertures.

主动反应堆区域由石墨包裹的圆柱形燃料棒堆积排列而成。

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A fuel stream is injected through at least one fuel injection side adjacent to the oxidant injection side in the combustion zone.

燃料物流通过至少一个燃烧区内与氧化剂喷入侧相邻的燃料喷入侧喷入。

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In the second zone, the wood fuel reacts with oxygen during pyrolysis.

在第二区，木材燃料与氧气反应热解过程。

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But Israeli officials are worried Tehran is rapidly approaching a point at which its nuclear-fuel production sites can no longer be removed through military action a so-called zone of immunity.

WSJ: Iran Cools Nuclear Work as Vote Looms