一起来看下面的解释：

　　Couch surfing is travelling on a budget, using a broad network of contacts in order to get overnight accommodation for free, or at as little cost as possible. Participants, dubbed couch surfers, join dedicated websites, providing as much information about themselves as possible in order to make others feel comfortable hosting them, or using them as a host. Various safety features are generally available in such online networks, like verification of names and addresses, personal references, and 'vouching for' a particular member as a reliable host or guest.

　　“沙发漫游”是一种经济的旅游方式，可以通过一个庞大的关系网免费或者用尽量低的费用在旅游目的地过夜。“沙发漫游者”一般会加入专门的网站，并尽可能多的提供他们的个人信息以使其他会员愿意为他们提供住宿或跟他们换房旅游。这类网站一般都会有安全认证程序，比如核实姓名和地址、个人推荐、以及“担保”某位会员为可靠房主或房客等。

　　让我们看一个例句：

　　It might sound crazy to travel halfway across the world to sleep on a stranger's sofa, but this is exactly what millions of people have done whilst participating in couch surfing.

　　到地球的另一边在陌生人家的沙发上过夜吗听起来可能有点疯狂，不过这恰恰是数百万参与“沙发漫游”的人做过的事情。(CRI)