Pick up的意思是拾起，学会，搭车，接人，接收信号等。

例句：

I picked up the book and started to read. （我拾起这本书开始阅读。）

I picked up the phone and dialed his number. （我拿起电话拨了他的号码。）

The children were picked up from school by their parents. （孩子们由家长从学校接走。）