Semi-detached housing consists of pairs of houses built side by side as units sharing a party wall and usually in such a way that each house's layout is a mirror image of its twin. this style is sometimes colloquially called a duplex; elsewhere, however, "duplex" refers to a building split into two flats/apartments (one above the other). The style is usually referred to in the mid-Atlantic (particularly Philadelphia) as a twin. ; Y: g/ m3 u- ]: b5 {, I5 Z- V - X5 g, ^3 N) w! S3 M5 Y就是一个房子俩家了。应该和RF2差不多吧