The Ppular Science nwledge and Science Technlg

科普知识与科学技术

历史上有很多发明，起着很重要的作用，其中一些改变了世界。依你之见，什么是最重要的发明，并说明原因，也就是它起的作用(不少于三点)。80词左右。

The Mst Helpful Inventin

There are a lt f inventins in the histr. Se f the pla an iprtant rle in peple’s life and se have greatl changed the wrld.

In pinin, I thin the st iprtant inventin is the car. First, peple used t travel b train r b plane. But nw, the can g an place b car. Secnd, when hlida ces, the can visit their fail and friends b car. Third, the can als g t an places f interest t en theselves.

In a wrd, I d agree that cars are the st iprtant inventin.