diffusion

香水的香气通过扩散慢慢充满整个房间。

The scent of perfume gradually filled the room through ___diffusion.

互联网极大地促进了科学知识的传播。

The internet has greatly facilitated the ___diffusion of scientific knowledge.

磨砂玻璃的光线扩散效果让整个房间显得更加柔和。

The frosted glass creates a gentle ___diffusion of light, making the room feel softer.