缘来文化,知识视界,科教视频,国际教育视频,青少科教视频,视频教育资源库

Video Recommended——

简图

Transportation Achievements

Country: America
Added: 2006
Category: History
Duration: 60 mins
Click to play>>
Abstract: Science continually marches forward, lead by inventors of great intelligence and vision, improving our lives and protecting our future. Technology finally decided to give the horses a break. Some of the best inventors have vastly improved the way we get from point a to point z.