in turn 转而,反过来,依次
in return 作为回报
Can I buy lunch for you in return for your help?
感谢你的帮忙,我请你吃午饭好么?
I asked her opinion,but she just asked me a question in turn.
我征求她的意见,她却只是反问了一个问题.
只不过是意思上的区分,没别的