气体反应堆要求充实，以此能，达到20%，所以，我们需要制造出在芯块中的铀，那是锆管道的金属外壳，那被放置入一个反应堆核心里去。

Gas reactors require enrichments in the order of up to 20%. So we need to fabricate the uranium into pellets which are clad in zirconium tubes which are placed into the reactor core.

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总共有485块锆石内部带有包体，其中有十几块包体中含有放射性微量元素，研究者可以根据它们来测定包体的年代。

A total of 485 zircons held inclusions, and about a dozen or so of these contained radioactive trace elements that allowed the researchers to determine their ages.

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