someone who likes to move around and travel, especially without a clear idea of what they want to do

He's a bit of a roamer, so he could be anywhere in the country. 他四处漂泊，所以可能在这个国家的任何地方。

someone who moves from one country to another to live and work

Roamers move abroad with just a couple of suitcases on a regular basis in search of professional or personal opportunities. 为了寻找工作或个人发展机会，这些国际打工族常常仅带着两个行李箱就去往国外。