the last but one/the next but two etcespecially British EnglishBrEBUT the last or next thing or person except for one, two etc 倒数第二/相隔两个等 Pauline and Derek live in the next house but one (=they live two houses away from us). 保利娜和德里克住的地方和这里相隔一栋房子。
→ the last but one/the next but two etc at but2(1)