在光线传播的简化过程中，产生了多重散射和单向散射两种理论。

There are multiple scattering theories and single scattering theories in the process of light propagation.

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从而以本文划分的早、晚期为经、以地域为纬，大致勾勒出该地区夏时期“多重结构的”考古学文化特征的形成过程。

This paper gave a brief account of the multiple culture structure of this area , at the early and late period.

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从而以本文划分的早、晚期为经、以地域为纬，大致勾勒出该地区夏时期“多重结构的”考古学文化特征的形成过程。

This paper gave a brief account of the multiple culture structure of this area , at the early and late period.

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