專門家 angolul

expert [experts]▼(person with extensive knowledge or ability)
noun
[UK: ˈek.spɜːt] [US: ˈek.spərt]

specialist [specialists]▼(expert)
noun
[UK: ˈspe.ʃə.lɪst] [US: ˈspe.ʃə.ləst]