There have been many great inventions, things that changed the way we live in. The first great invenThe first great invention was one that is still very important today一the wheel. This made it easier to carry heavy things and to travel long distanc

There have been many great inventions, things that changed the way we live in. The first great invenThe first great invention was one that is still very important today一the wheel. This made it easier to carry heavy things and to travel long distanc
There have been many great inventions, things that changed the way we live in. The first great inven
The first great invention was one that is still very important today一the wheel. This made it easier to carry heavy things and to travel long distances. For hundreds of years after that there were few inventions that had as much effect as the wheel. Then in the early 1800's the world started to change. There was little unknown land left in the world. People did not have to explore much anymore. They began to work instead to make life better. In the second half of the 19th century many great inventions were made. Among them were the camera, the electric light and the radio. These all became a big part of our life today.
　　The first part of the 20th century saw more great inventions. The helicopter in 1909. Movies with sound in 1926. The computer in 1928. And jet planes in 1930. This was also a time when a new material was first made. Nylon came out in 1935. It changed the kind of clothes people wear. The middle part of the 20th century brought new ways to help people get over disease. They worked very well. They made people healthier and let them live longer lives. By the 1960's most people could expect to live to be at least 60. By this time most people had a very good life. Of course new inventions continued to be made. But man now had a desire to explore again. The world was known to man but the stars were not. Man began looking for ways to go into space. Russia made the first step. Then the United States took a step. Since then other countries, including China and Japan, have made their steps into space. In 1969 man took his biggest step away from earth. Americans first walked on the moon. This is certainly just a beginning though. New inventions will someday allow us to do things we have never yet dreamed of.

There have been many great inventions, things that changed the way we live in. The first great invenThe first great invention was one that is still very important today一the wheel. This made it easier to carry heavy things and to travel long distanc
第一项伟在的发明是一个现今都还非常重要的发明,那就是车轮.车轮使携带重物及长途旅行更容易.在它被发明后的四百年内,几乎再没有象它一样有影响力的发明了.然而在十九世纪初期,这个世界开始发生了变化,世界上几乎没有未知的土地剩下了.人们不必再去探索更多,取而代之的是,他们开始工作以使生活变得更美好.在19世纪下半叶,有了很多更伟大的发明,其中有摄像机,电灯和收音机,这些发明全部成为我们生活的重要部分.
二十世纪的初叶见证了更多的伟大发明.譬如1909年的直升飞机,1926年的有声电影,1928年的电脑,还有1930年的喷气式飞机.同时它也是一些新材料被制成的年代.1935年尼龙问世了,它改变了人们所穿衣服的种类.20世纪中叶也带来了帮助人们克服疾病的新方法.这此方法很有效,他们使人们更健康同时也使人们活得更长久.到19世纪60年代为止,绝大部分人都能奢望至少能活到60岁,同时他们也过上了好日子.当然,新发明仍然在继续问世,但是此时人类又有了重新探索的渴望.这个世界已为人类所了解,可还有其它星球还没有.因此人类又开始寻找进入太空的方式.俄国迈出了第一步,然后是美国.此后,其他国家,包括中国与日本,也都迈开了探索太空的步代.在1969年,人类迈出了离开地球的第一步,美国人首先登上了月球.当然这也只是一个开端,将来某一天,新发明将可以使我们做到我们甚至还未梦想的事情.