阳光透过窗户洒满整个房间。

Sunlight ___diffused through the window and filled the entire room.

窗帘柔和地散射了午后的阳光。

The curtains ___diffuse the afternoon sunlight softly.

教授的讲座内容太过散漫，让人难以抓住重点。

The professor's lecture was too ___diffuse to grasp the main points.