n.扩散器；漫射体；扬声器纸盆；传播者
No fresh air came out of the diffuser in the pond. 塘底的空气扩散器没有释放空气出来.
An integrated lower rear diffuser reduces drag and improves fuel efficiency. 集成的后部扩散器减少低阻力，提高燃油效率。
