英语翻译

英语翻译
One day I happened to meet an Englishman in the street and soon we began to talk.As I was talking about how I was studying English,the foreigner seemed to be very surprised,gently shaking his head and saying "You don't say!" I was puzzled,and I thought,"Perhaps this is not a right thing to talk about." So I said to him,"Well,shall we talk about the Great Wall?Have you ever been there?"
"Certainly!Everyone back home will laugh at me if I leave here without seeing it.The Great Wall is wonderful!" "Yes,it is one of the wonders in the world.And people of many countries have come to visit it." As I went on telling him more about it,he stopped me again,"You don't say!"
I couldn't help asking,"Why do you ask me not to talk about it?"
"Well,I didn't ask you to do so," he answered,greatly surprised.
"Did you say 'You don't say!" I asked again.
Hearing this,the foreigner laughed loudly.He began to explain,"'You don't say!' means 'Really'.Perhaps you know little about English idioms."
Wow!How foolish I was!Since then I have been careful with English idioms.