train graph pen

例句：

1. 1. The athlete needs to train hard before the competition.
   这位运动员需要在比赛前刻苦训练。
2. 2. The teacher trained us on how to use the new software.
   老师教我们如何使用这款新软件。
3. 3. The child is learning to ride a bicycle by training with his father.
   这个孩子正在通过和他父亲一起训练来学习骑自行车。