英语高手帮忙修改下自我介绍,明天上午十点半要用!

题目

英语高手帮忙修改下自我介绍,明天上午十点半要用!
这是我写的：Hello everyone,my name is William.I am 14 years old.I believe I can make a good performance today.First of all ,I will tell you a joke.One day,a student whose grades were very bad said to her mum:I want to be a scientist in the future.Her mum thought her son would be changed.And she said happily:oh my son,what a great dream.And I want to know what you do for it?Her son said:I still sleep well every day to save my Brain Cells for my dream job.What a funny boy he was.I have the same dream as he,but I have done lots of things for it.I study very hard,English especially.Because I think I will go to America to get an education there.Then I will return to my motherland and experiment continuously.And one day I will succeed.At that time I will find a secluded village and live there with my family to end my life.That’s all I want to say,thank you.
我想要表达的意思是：我的名字是william.我今年十四岁了.我相信我今天会有一个很好的表现.首先,我来给你讲个笑话.有一天,一个学习很差的学生跟他妈妈说：我以后想做一名科学家.他妈妈认为他的孩子改变了,高兴的说：孩子,我想知道你都为理想做了什么了呢?孩子回答道：我每天都睡眠很好来积攒我的脑细胞.多么滑稽的一个小孩啊.我有着和他一样的梦想,但是我已经为我的梦想坐了许多.我努力的学习,尤其是英语.因为我认为我要去美国得到好的教育.然后我将回到祖国不断地实验.然后有一天,我终究会成功.到那时,我会找到一个僻静的小山村去和我的家人一起居住完结人生.我想说的都说完了,

答案

Hello everyone, my name is William. I am 14 years old. I believe I can make a good performance today. First of all ,I will tell you a joke. One day, a student ,who did poorly in study,said to her mum:" I want to be a scientist in the future. "Her mum thought her son would change. And she replied happily: "oh my son, what a great dream. And I want to know what will you do for it?" Her son answered: "I still sleep well every day to save my brain cells for my dream job."Don't you think he was a funny boy ? I have the same dream as he does, but I have done lots of things for it. I study very hard, especially in English. Because I think I will go to America to have further study there. Then I will return to my motherland and make contribution to her. I hope I can succeed in the future. After that I will find a quiet village and live there with my family in the rest of my life. That's all I want to say, thank you.