劍橋詞典

a province of Ireland, part of which is now in Northern Ireland and part in the Republic of Ireland
阿爾斯特（愛(ài)爾蘭的一個(gè)省，分屬北愛(ài)爾蘭和愛(ài)爾蘭共和國(guó)）

a name for Northern Ireland, which is part of the UK
阿爾斯特（對(duì)北愛(ài)爾蘭的稱呼） 返回 Ulster