There are four colors: Ambient, Emissive, Diffuse, and Specular.
其中四种是颜色：环境光色、发射光色、漫射光色和反射光色。
Diffusion is when you have a fluid in which you are introducing some substance, and you want to figure out how that thing is going to spread out, the technical term is diffuse, into the ambient fluid.
扩散就是，当在某液体中加入某物质时，想算出该物质怎样在周围的液体中散开，专业术语叫做扩散。
The scene in this sample is rendered using a pixel shader to control the ambient, diffuse, and specular contribution of each light at every pixel.
该例子的场景渲染使用了像素着色器来控制环境光，漫反射，镜面反射作用于每个像素上的各个光照。
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