maisonette

详细解释:n. 小屋, 小住宅, (公寓大楼中)占两层楼面的一套公寓, (二层楼的)公寓房子

英语解释：

名词 maisonette:

a self-contained apartment (usually on two floors) in a larger house and with its own entrance from the outside同义词：maisonnette