ADJ（形容词） If someone, especially an American, is Scotch-Irish, they are descended from both Scottish and Irish people, especially from Scottish people who had settled in Northern Ireland. (尤指美国人)有苏格兰-爱尔兰血统的 [美国英语]
N-PLURAL（复数型名词） Scotch-Irish is also a noun. 苏格兰-爱尔兰 [usu 'the' N]
...Virginia's Great Valley, where the Scotch-Irish had settled in the eighteenth century.
...弗吉尼亚大峡谷，苏格兰-爱尔兰后裔曾于18世纪在这里定居。