Most of the workers had already rung in by the time I arrived.我到达时,大多数工人已经打卡上班了。They arrived to clock in and found the factory gates locked.他们来打卡上班,却发现工厂大门锁住了。They arrived to clock on and found the factory gates locked.他们到了工厂准备打卡上班,却发现大门没开。What time did you clock on?你几点打卡上班的?