非常熟悉

• know through and through
• have intimate knowledge of

例句

1. 这位外国人对当地的风俗非常熟悉。
   The foreigner knew the local custom very well.
2. 人们对萧伯纳姓名的首字母GBS非常熟悉。
   George Bernard Shaw was well-known by his initials GBS.