two-up two-down
noun [ C ] UK informal uk/tuːˌʌp tuːˈdaʊn/ us/tuːˌʌp tuːˈdaʊn/
两上两下的小房屋（指楼下有两间主要的房间，楼上有两间卧室）
a small house on two levels that has just two main rooms on the ground floor and two bedrooms on the top floor
a modest two-up two-down 一幢普通的两上两下的房屋