acquainted

Are you acquainted with the facts in this case? [=do you know the facts?]你对案情了解吗？

I am (well) acquainted with his books. [=I have read his books]我（非常）了解他的书。

Are you two acquainted? [=have you met before?]你们两人认识吗？

The two actors are intimately/casually acquainted. [=they know each other intimately/casually]这两个演员关系密切/只是泛泛之交。

Let's take a walk and get acquainted.我们去走走，互相了解一下。

I'll go get us some drinks while you two get better acquainted. [=while you two talk to each other and get to know each other better]我去拿点喝的，你们俩正好互相多了解一下。

It took him a few months to get/become acquainted with the other students.他花了几个月的时间去结识其他学生。