在许多古代部落中，酋长国是由一位首领统治多个村庄的政治结构。

In many ancient tribes, ___chiefdoms were political structures where a single leader ruled over multiple villages.

这个酋长领地的边界由山脉和河流自然划定。

The boundaries of this ___chiefdom are naturally defined by mountains and rivers.

考古学家发现这个地区在青铜时代从部落逐渐发展成了酋邦制社会。

Archaeologists found that this region gradually evolved from tribes to ___chiefdoms during the Bronze Age.