be au fait with sth

be au fait with sth to be familiar with a system or way of doing something精通（熟悉）某事物:•I'm not really au fait with the computer system yet.我还没有真正熟悉这套计算机系统。

• Anzio bridgehead
• let sb off (sth)
• classicality
• confining
• switch sth↔off/on
• abortionists
• a brick short of a load （或two sandwiches short of a picnic, etc.）
• adst.feb.
• brewiss
• as well (as sb/sth)
• bioecological
• give point to
• Heaven / God / who / goodness knows!
• to that extent
• benevolent
• botryomycoses
• Biblism
• begot 或 begat
• by hook or crook
• bossets
• Araqil
• Barnato, Barney
• bander
• comfiest
• cicatrizes
• to the death
• castellan