这里主要是要理解pick up 这一短语
拾起
The boy picked up the hat for the old man.
男孩替老人拾起了帽子.
2.收拾
You should pick up the tools after work.
工作结束后应该把工具收拾好.
3.学到;获得
He was picking up the skills quickly.
他正在很快地掌握技术.
4.【口】与...偶然结识(常指与异性调情)
We picked up a couple of girls at the pub last Friday.
上星期五我们在酒吧结识了几个女孩.
这里没有上下文,个人认为应该是“你已经理解了”之类的意思
