这张纸摸起来有凹凸的感觉。

Zhè zhāng zhǐ mōqǐlái yǒu āotū de gǎnjué.

This paper feels textured to the touch.

这里的地面凹凸不平。

Zhèlǐ de dìmiàn āotūbùpíng.

The ground here is uneven.

电梯里的凹凸按钮是特意为了盲人而设。

Diàntī lǐ de āotū ànniǔ shì tèyì wèile mángrén ér shè.

The raised buttons in the elevator are specifically designed for blind people.