pick up on

例句：

1. 1. She picked up on his hint and followed him to the door.
   她察觉到他的暗示，跟着他到了门口。
2. 2. The teacher was able to pick up on the student's confusion and provided a clear explanation.
   老师能够察觉到学生的困惑，并给出了清晰的解释。
3. 3. After watching the documentary, she picked up on the historical significance of the event.
   看完纪录片后，她领悟到了这一事件的历史意义。