第 81 课: 了解历史-1

Armor was used by knights between 1100 and 1500. 从十二到十六世纪，骑士们穿盔甲。

Cannons were used around 1800. 在十九世纪，士兵们用大炮。

Tanks are used today. 如今，士兵们用坦克。

Machine guns are used today. 如今，士兵们用机枪。

This kind of structure is built today. 这种建筑建于现代。

This kind of structure was built between 1100 and 1500. It is called a cathedral. 这种建筑建于十二到十六世纪之间，它叫做大教堂。

This structure was built around 1889. 这座建筑建于一八八九年。

This structure was built thousands of years ago. 这座建筑建于几千年以前。