" To trade places with (someone)" means to exchange your situation for another situation.

“To trade places with (someone)” 意思是用你的处境换取另一种处境。

He says, " I'd trade places with her any day." To " trade places with someone" means to exchange roles with another person, to live someone else's life, to do what someone else is doing.

他说：“我随时都会和她交换位置。 ” “与某人交换位置” 意味着与另一个人交换角色，过别人的生活， 做别人正在做的事情。