高高低低

gāogāodīdī

高高低低 — gāogāodīdī

high and low; uneven (in height); uneven (of ground)
小路高高低低，走起来很费劲。 xiǎolù gāogāodīdī zǒu qǐlái hěn fèijìn — The path is uneven, making it tiring to walk on.