to be acquainted with sth
+ place, method, work了解…；熟悉…
He was well acquainted with the literature of France, Germany and Holland.他对法国、德国及荷兰的文学了如指掌。
+ fact了解；认识
Once the American people are acquainted with the facts, there is sure to be a public outcry.一旦美国人民了解了事实, 公众一定会强烈抗议。