domain
/dəuˈmeɪn; do`men/ n
1 lands owned or ruled by a nobleman, government, etc （贵族、 政府等的）领 地, 领土
trespass on the King's domain 私闯国王领地
(fig 比喻) The kitchen is my wife's domain; she doesn't like me going into it. 厨房是我妻子的领地, 她不愿意让我进去.
2 field of thought, knowledge or activity （思想、 知识或活动的）领域, 范围, 范畴
(in) the domain of political science （在）政治学领域（内）
Military history is really outside my domain. 我对军事史实在一窍不通.