hierarchy
UK ['haɪə.rɑ:.ki] US ['haɪr.ɑ:r-] noun countable
■a system in which people or things are arranged according to their importance 等级制度•Some monkeys have a very complex social hierarchy.某些猴群有非常复杂的种群阶级。 •He rose quickly through the political hierarchy to become party leader.他的政治地位迅速提升，成了该党领袖。 ■the people in the upper levels of an organization who control it 统治集团 |