体系 /tǐxì/ angolul

regime [regimes]▼(mode of rule or management)
noun
[UK: reɪ.ˈʒiːm] [US: rə.ˈʒiːm]

system [systems]▼(collection of organized things; whole composed of relationships among its members)
noun
[UK: ˈsɪ.stəm] [US: ˈsɪ.stəm]