约公元前700年，中国的金属工人学会制作铁器工具和武器。

By about 700 BC, Chinese metal-workers learned to make iron tools and weapons.

youdao

约公元前700年，中国的金属工人学会制作铁器工具和武器。

By about 700 BC, Chinese metal-workers learned to make iron tools and weapons.

youdao