;To the question why we do not find rich fossiliferous deposits belonging to these assumed earliest periods prior to the Cambrian system, I can give no satisfactory answer.
对于为什么我们没有发现大量
属于这个比寒武纪还要早
化
，我无法给出满意答案。
To the question why we do not find rich fossiliferous deposits belonging to these assumed earliest periods prior to the Cambrian system, I can give no satisfactory answer.
对于为什么我们没有发现大量属于这个比寒武纪还要早化，我无法给出满意答案。
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