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。
Plug in the power, medium heat diffusion can diffuse essential oils.
插上电源，中等热度就可以使精油扩散弥漫。
A function of the diffusion coefficient and attenuation coefficient was derived from the measured diffuse reflectance.
又从测得的漫反射率推得漫射系数和衰减系数的函数。
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