railway duty

例句：

1. 1. The railway company is responsible for maintaining the safety of its passengers and staff.
   铁路公司负责维护其乘客和员工的安全。
2. 2.The railway duty officer was assigned to inspect the tracks before the train departed.
   铁路值班官员被指派在火车出发前检查轨道。
3. 3. The railway duty includes ensuring the smooth operation of the trains and the safety of the passengers.
   铁路职责包括确保列车的平稳运行和乘客的安全。