他们打卡下班，于2点50分离开。They clocked off duty and left at ten to three.值夜班的警员准备打卡下班。The Night Duty Officer was ready to clock off.他们到了工厂准备打卡上班，却发现大门没开。They arrived to clock on and found the factory gates locked....

“打卡”的英语可以翻译为：punch the clock ...