火灾导致烟雾迅速扩散。

Huǒzāi dǎozhì yānwù xùnsù kuòsàn.

The fire caused smoke to spread rapidly.

这种信息很容易在社交媒体上扩散。

Zhè zhǒng xìnxī hěn róngyì zài shèjiāo méitǐ shàng kuòsàn.

This type of information easily spreads on social media.

香水的香气会在空气中扩散开来。

Xiāngshuǐ de xiāngqì huì zài kōngqì zhōng kuòsàn kāi lái.

The fragrance of perfume will diffuse in the air.