knock your socks off 叹为观止，使人感到非常震惊

　　The show last night really knocked my socks off.

　　昨晚的表演简直让我叹为观止。

　　This movie will knock your socks off. I promise.

　　这部电影会让你叹为观止，我保证。

　　疯狂练习吧！