u.s. customers historically tipped people they assumed were earning most of their income via tips, such as restaurant servers earning less than the minimum wage.
历史上，美国顾客通常会给那些他们认为大部分收入来自小费的人小费，比如那些赚取的工资低于最低工资的餐厅服务员。
Customers in the past nearly always paid tips after receiving a service, such as at the conclusion of a restaurant meal, after getting a haircut or once a pizza was delivered.
过去的顾客几乎总是在接受服务之后支付小费，比如在餐厅用餐结束时、理发之后或披萨送达后。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。