n.擴散；散布；傳播；漫散
The diffusion process seems to be accelerating. 傳播過程看來正在加速。
This diffusion of knowledge accelerated dramatically in recent decades. 近幾十年來，知識的傳播速度大大加快。
Clouds cause the diffusion of light from the sun. 云使陽光漫射。
彌漫說
