to know or be familiar with something, because you have studied it or have experienced it before

Police said the thieves were obviously well acquainted with the alarm system at the department store. 警方称，盗贼显然对百货商店的报警系统了如指掌。

I am very well acquainted with the government's approach to terrorists.

Almost everyone who is acquainted with the sport believes that the scale of drug abuse has been underestimated.

The planning team should be acquainted with the challenges of organizing a large convention.

Even someone who is not all that acquainted with technology can install our antivirus software.

See also: acquainted