What is the translation and annotation of "pestle grinding into needle"?

Mozhenxi is at the foot of Xianger Mountain in Meizhou. Legend has it that when Li Bai was studying in the mountains, he went out to play without finishing his homework. He passed by a stream and saw an old woman grinding an iron bar there. (He was surprised) So he asked the old woman what she was doing. The old woman said, "This iron bar will be ground into a needle." Li Bai laughed at the old woman's stupidity. The old woman said, "As long as you work hard enough, things will work out naturally." Li Bai was very surprised at the old woman's perseverance, so he went back and finished his homework. The old woman calls herself Wu. Now there is a Wushiyan by the stream. To annotate ...

1 Meishan: an ancient place name, located in Meishan, Sichuan.

2 generations: handed down from generation to generation. Generation after generation. Spread out, spread out.

30%: completed, realized.

4 Go: Leave.

5. meet: meet, meet.

6. Er (m-o): a title of respect for an elderly woman.

7. Fang: I am.

8. pestle (chǔ): iron bars, bars, pestles, sticks and round sticks used to press rice or beat clothes, with thick heads and thin heads.

9. Desire: Want.

10. Feel: moved ...

1 1. and: return.

12.1: Pronouns refer to what the old woman is doing.

13. graduation: complete your studies.

14. Today: Now.

15. Last name.

16. Taibai was deeply impressed: Li Bai was moved by her words and deeds. Feel, be moved. Meaning, thought, intention.

English is "tiě chǔ mó zhēn", which is an idiom. It means that as long as you are determined and willing to work hard, even the most difficult things can be successfully completed. It is a commendatory term, which can be used as predicate, object, attribute and adverbial. In the Ming Dynasty, Zheng Zhizhen's "Mulian saves the mother Liu's school" why Hao wrote: "Like an iron pestle grinding a needle, the heart is firm and there is a needle day."