hierarchy

/ˈhaɪˌrɑrki/

a series of ordered groupings of people or things within a system

中文释义：等级制度；层级

The company has a clear hierarchy, with managers at the top and workers at the bottom.

公司有明确的等级制度，经理在上层，工人在底层。

In many societies, social hierarchy determines access to resources and power.

在许多社会中，社会等级决定了资源和权力的获取。