knock spots off sb/sth是什么意思

词组 knock spots off sb/sth 释义 ●knock spots off sb/sth (BrE, informal) be very much better than sb/sth else 远远胜过；使失色◆This book knocks spots off all the other books on Napoleon.这本书使所有其他描写拿破仑的书相形失色。◆You’ll knock spots off...