roofyn.氟硝安定(催眠镇静药)
roofn.屋顶;顶vt.覆盖;给 ... 覆以屋顶
roof saddle鞍形屋脊
roof timber屋顶用木料,顶梁
roof runoff屋面径流
roof-deck屋顶平台
roof leader屋顶落水管
roof-coal项煤
roof caving初次落顶
roof purlin屋顶檩条
roof window屋顶天窗
roof-deskn.屋顶平台