document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=69073\">美国每周安装数百台比特币自动取款机</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=69075\">单细胞在两年内演化出大型多细胞形式</a></p></div>");