W-2：water off a duck's back 全然不起作用

　　A:How is Grandpa doing recently?

　　A:最近爷爷身体怎么样?

　　B:Not good. The doctor told him not to smoke again, but it just rolls off him like water off the duck's back!

　　B：不好，医生让他不要再抽烟了，可这被他当成耳旁风，一点儿用也没有!

　　A:Maybe I would talk with him someday.

　　A:哪天我得跟他谈谈。

　　B:I hope it will be of some use.

　　B：希望这会有点儿用。