求英语达人帮助查看翻译，谢谢！

Since 1972 when Bill Gates was a teenager(teenager本身就表示十几岁的少年），he boasted（夸口说）that he would become a millionaire at the age of twenty.Though he didn't achieve this goal completely, he became a illionaire after only fifteen years. By 1992,(by 到什么什么为止） as President of Microsoft company, he became the richest person in the world.
　　 Bill Gates was born in Seattle, Washington in October ,1956.He was named（命名） William by his father and mother. Gates is an energetic(精力充沛的） and intelligent boy since childhood. At the age of nine, he finished reading （完成做某事） The Encyclopedia Of World Knowledge(书名要用斜体表示）. His favorite subjects are maths and science. He likes "thinking" best as a way of relaxing.

1972年，比尔盖茨还是一位十几岁的少年时，他就夸下海口，到20岁要成为百万富翁。尽管他没有完全实现这个目标。但仅仅15年以后，他就成为了亿万富翁。到了1992年，作为微软公司的总裁，他便成为了世界首富。
比尔盖茨于1956年10月出生于华盛顿州的西雅图市，随父亲和母亲取名为威廉。盖茨从小就是一位精力旺盛、才智过人的孩子。九岁的时候，他就读完了《世界知识百科全书》。在学校里他喜欢的科目是数学和科学，他最喜欢的消遣方式是“思考”

In 1972, when Bill Gates was a teenager, he had boasted to become a millionaire at his 20 . Although he did not fully achieve this objective, after only 15 years, he became a billionaire. By the year of 1992, as President of Microsoft company, he became the richest person in the world. Bill Gates was born in October, 1956 in Seattle, Washington, named after his father and mother as William. Gates was particularly energetic, intelligent even when he was very young. At the age of nine, he finished the World Encyclopedia of Knowledge. His favorite subjects at school were math and science. His best recreation is thinking.

改了一些，基本是按网站翻译的顺序。希望能帮助你！

In 1972, Bill Gates， who was just a teenage then, boasted to be a millionaire when he was twenty years old. He did not actually realize his deam but he did turn into a billionaire 15 years later. That's not the end of the story: in 1992 he topped the Forbes List being the President of Microsoft.

Born in October of 1956 in Seattle,Washington, Bill Gates was named William after his parents. Gates, particularly energetic and highly intelligent, finished the world encyclopedia of knowledge enven when he was only nice years old.. He prefered math and science most and meditation was his best way to relax.

看你这文章应该不是用机器翻译出来了，我给你大致修改了一下。

纯机器翻译，一个一个词的对应，当然语法不对啦。我给你修改一下把。, When Bill Gates was in his teenage, he boasted In 1972 that he would become a millionaire. Although he did not fully achieve his goal. But only 15 years after that he had become a billionaire. By the year of 1992, he,as President of Microsoft company, became the richest of the world. Bill Gates was born in October 1956 in Seattle, Washington, named William after his father and mother. Gates, as he is particularly energetic and intelligent, , he had read the world encyclopedia of knowledge at the age of nine. His favorite subjects at school are math and science

语法上好像没什么大问题。只不过它翻译的有很多从句插入语什么的，看起来变复杂了