For the next few years, Leonardo designed buildings, machinery and weapons of war.

在接下来的几年里，列奥纳多设计了建筑、机械和战争武器。

It makes money by building machinery and equipment and sending it abroad to other countries like China.

它通过制造机器和设备并将其运往中国等其他国家来赚钱。

They also started practicing organic farming and building their own farm machinery with the help of local blacksmiths.

在当地铁匠的帮助下，他们还开始实践有机农业并建造自己的农机。