Mat is one of the greatest invention of mankind.

人类最伟大的发明之一，就是发明了席。

I think steam engine is the greatest invention.

我认为最伟大的发明是蒸汽机。

The computer was the greatest invention of last century.

计算机是上世纪最大的发明。

What is the greatest invention in your opinion and why?

在你心目中，什么是最伟大的发明，为什么？

Insurance is nearly two hundred years since the greatest invention!

保险是近两百年以来最伟大的发明！

You know, this is the greatest invention Italy ever made. Just mix it.

这是意大利最伟大的发明。搅拌一下。