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
们没有发现大量
属于这个比寒武纪还要早时期
，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.
对于为什么们没有发现大量属于这个比寒武纪还要早时期，无法给出满意答案。
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