有老美还认为美洲印第安人来自明代郑和船队.郑和才是第一个登上美洲大陆

 

没有发达技术,怎么造能航行这么远的船?

 

Between 1405 and 1433, the Ming government sponsored seven naval expeditions.

Between 1492 and 1503, Columbus completed four round-trip voyages between Spain and the Americas, all of them under the sponsorship of the Crown of Castile.