【正确答案】[译文]Bai Li is a great poet in Tang dynasty．
It is said that he was fun，afraid of difficulties and making slow progress in reading as a child．
One day,Bai Li saw an old lady grinding a very thick iron bar when he walked pass a river on his way home．He felt strange，then went up to the old lady and asked：
“grannie，what are you doing that for?”
The old lady said：“grinding the iron bar into a needle．”
Then，Bai Li felt stranger,and asked：
“How can you grind such a thick iron bar into a needle?”
The old lady told him：
“Yes，it does work!With time and patience the leafofthe mulberry becomes satin．”
Bai Li suddenly understood a lot after hearing those words．
Since then，Bai Li studied very hard and got a great progress．He subsequently became a famous poet．