acquaint 有 使了解、熟悉 的意思 当然在介绍人或物的时候 和introduce是一样的
至于区别
Let me acquaint you with the facts.
让我把事实告诉你.
My mother acquainted her with my intention.
我母亲把我的意图告诉了她.
I am already acquainted with him.
我已经和他相熟.
You must acquaint yourself with your new duties.
你必须熟悉你的新任务.
看了这几个句子你应该懂了