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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在本文的研究过程中，在不失真实性的前提下，将其进一步简化，采用前向为主的多重散射和单向散射相结合的方法进行光线的渲染。

This paper further simplifies the process of light propagation without losing the authenticity. We mainly USES the multiple forward scattering and single scattering to render the light.

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利用背散射电子衍射取向成像技术分析了在热模拟单向压缩条件下Q235碳素钢应变强化相变中铁素体晶粒的取向（差）变化特点。

The microstructure evolution of Q235 plain carbon steel in multi-pass hot deformation was investigated by means of hot compression simulation.

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