buy one
我会帮你买一张演唱会门票。
I'll help you buy a concert ticket.
先生来买一张吧?
Sir, would you like to buy one?
— 调音师 (2018)
那你应该买一张回家不用每次来这里睡你这里舒服点
Then you should buy one to take home, so you won't have to come here to sleep every time. You sleep more comfortably here.
— 无间道 (2002)