Each witness in turn gave his or her version of what happened.每位目击者轮流讲述了事情的经过。

The algae feeds the fish, which in turn become food for larger sea animals.鱼类以藻类为食，又成为更大的海洋动物的食物。

I supported him and expected that he, in turn, would support me.我支持他，希望他也因此支持我。