acquaint oneself with

1. 知悉
   He acquainted himself thoroughly with every aspect of the question.

   他徹底明瞭這問題的每一個涵蓋面。

acquaint sb. with

1. 把……通知某人；使某人了解
   They acquainted Chinese readers with recent happenings in the Middle East.

   他們向中國讀者介紹中東最近的動態。

acquainted with

1. 與……相識
   They are acquainted with each other.

   他們互相認識。

2. 了解
   He is already acquainted with the facts.

   他已知道那些事實了。