document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=71506\">科学家发现大量稀有核聚变燃料</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=71508\">科学家警告称海洋开始失去记忆</a></p></div>");