剑桥词典a province of Ireland, part of which is now in Northern Ireland and part in the Republic of Ireland 阿爾斯特（愛爾蘭的一個省，分屬北愛爾蘭和愛爾蘭共和國） a name for Northern Ireland, which is part of the UK 阿爾斯特（對北愛爾蘭的稱呼） 返回 Ulster