train locomotive

例句：

1. 1. The athletes are training for the upcoming competition.
   运动员们正在为即将到来的比赛进行训练。
2. 2. The teacher instructed the students on how to use a new software program.
   老师向学生们介绍了如何使用新的软件程序。
3. 3. The conductor is training the new trainees on the safety procedures.
   列车长正在培训新员工关于安全程序。