It found that colobine primates that inhabit colder environments tend to live in larger, more complex groups.

研究发现，生活在较冷环境中的亚洲叶猴往往生活在更大、更复杂的群体中。

They live cooperatively in complex social groups and recognize members of their community as individuals.

他们在复杂的社会群体中合作生活，并将社区成员视为个体。

It takes elephants the same amount of time to learn how to function as members of one of the most complex social groups in the animal kingdom.

大象需要花同样多的时间来学习如何作为动物王国中最复杂的社会群体之一的成员生存。

Earth in the 21st century is covered in millions of kilometres of wires transporting electricity and a complex group of machines like transformers, that make this transfer possible.

21世纪的地球被数百万千米运输电流的电线，以及使这种传输变得可能的复杂机器网络（例如变压器）包着。

Much like human hunter-gatherers, they lived and hunted in complex social groups consisting of a few nuclear families, and used their social skills to cooperatively take down larger creatures.

就像人类狩猎采集者一样，他们在由少数核心家庭组成的复杂社会群体中生活和捕猎，并利用他们的社交技巧合作捕获更大的生物。