We 've personally seen the term " couch " loosely defined as : air mattresses , futons , private bedrooms , random space on the floor , tents , camper vans , sleeping bags , and even completely empty houses .

从个人角度来看，我们把“沙发床”这个词宽泛地定义为：弹簧床、蒲团、私人卧室、地板上的任意空间、帐篷、露营敞篷车、睡袋、甚至是个什么都没有的房子。