between

He supplements his regular meals by eating between meals.

他在两餐之间吃点东西来补充正餐。

Mother interposed in the dispute between my brother and me.

母亲干预了我和哥哥之间的争论。

The object of these experiments was to find the connection, if any, between the two phenomena.

这些实验的目的就是探索这两种现象之间的联系，如果存在着任何联系的话。