在一个对于单一群体来说非常大的系统里，有着许多决策层：例如萨赫勒的游牧民族，过去有着许多互相重叠的非正式权威遍布于尼日尔河上上下下。

In systems too large for a single group, there are layers of decision-making: the nomads of the Sahel, for example, used to have overlapping informal authorities up and down the Niger river.

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幼稚园事实上是非常正式的教育系体之一，是由一位名为福禄。贝尔的人所建立。

Kindergarten was actually a very formalized system of education, established by a man named Friedrich Froebel, who was a crystallographer in the 19th century.

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