You know, if you actually think about it, if somebody is totally blind -- a guy yesterday did a demonstration in one of the rooms, where people had to close their eyes and they could just hear things.
你看,如果你认真去思考, 如果这个人已经完全瞎了 - 某人昨天做了一个演示, 在一个大家都闭上眼的房间里,他们只能听到声音.