查票人

例句：

1. 1.The checker at the train station was very helpful.
   火车站的检票员非常乐于助人。
2. 2.The checker made sure everyone had their tickets before they could board the bus.
   检票员确保每个人都持有车票，才能登车。
3. 3. The checker noticed that there were no tickets for the concert and informed the organizers.
   检票员注意到音乐会没有门票，并通知了主办方。