know sb/sth inside out是什么意思

词组 know sb/sth inside out 释义 ●know sb/sth inside out (informal) know sb/sth very well 通晓；对…极为熟悉；了如指掌◆You’ve read that book so often that you must know it inside out by now.你经常读这本书，应该对它了如指掌了吧。◆She knows me inside o...