乐宁外教口语天天练:第 104 期（在线收听）

乐宁外教口语天天练No.104

I know this book inside out.

inside out 意为

to know something very well.

I know this book inside out.

inside out 意为

to know something very well.

译文：我对这本书了如指掌。

谢谢收听，明天继续^^