手背

tā yòng shǒu bèi mǒ qù é shang de hàn shuǐ

她用手背抹去额上的汗水。

She used the back of her hand to wipe the sweat from her brow.

tā shǒu bèi shang de yī chù qīng dù shāo shāng

他手背上的一处轻度烧伤

a slight burn on the back of his hand

tā yòng shǒu bèi cā le cā zuǐ

他用手背擦了擦嘴。

He wiped his lips with the back of his hand.