They travel together on a raft made of wood down the Mississippi River.

VOA: special.2010.03.21

Sam used to be a river raft guy, a river rafting guide, so we would go do that.

萨姆以前是漂流队的指导员，所以我们可以玩那个。

与朋友们的回忆 - SpeakingMax英语口语达人