(of a person) using their left hand to write and do most things

Are you left-handed? 你是左撇子吗？

a left-handed bowler 左撇子投手

(of an object or device) designed to be used by a left-handed person

left-handed scissors 左手用剪刀

(of an action or activity) done using the left hand

a left-handed golf swing （高尔夫）左手挥棒击球