These tribes participated in long networks of trade and cultural exchanges .

在漫长的商贸网和文化交流中都有这些部落的参与。

European contact brought immediate changes in many tribes of north america .

欧洲人的到来，在北美洲的很多部落引发了剧烈的变化。

Members of the amazonian tribes also had trouble matching numbers larger than three or four .

亚马逊部落的成员在大于三或四的数目方面也有困难。

Bedouin tribes wore them for protection from the harsh weather conditions in the desert .

贝都因部落的人穿它们是为了抵挡沙漠的恶劣环境。

Tribes were therefore most likely compelled by violence to relinquish their autonomy .

因此，部落极有可能在暴力的威胁下交出自治权。

Nonetheless , some tribes have clearly made progress since 1975 .

不管怎样，自从1975年，一些部落明显已经取得了一些进步。

The four human tribes would be permanently separated by the harsh conditions that stand between them .

四个人类部落将被处于他们之间的恶劣条件所永久分割开来。

It 's especially common among the khoisan in southern africa and tribes in the andaman islands .

这在南非的科伊桑人和安达曼群岛的部落中尤为常见。

Local tribes protested by attacking infrastructure and closing roads to the capital .

地方部落为此袭击了一些基础设施并关闭了通往首都的公路，以示抗议。

Does this suggest that these symbols travelled with prehistoric tribes as they migrated from africa ?

这是否说明这些符号随着非洲迁移来的史前人类部落一起漂洋过海到了欧洲呢？