document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=70682\">巨型无人机运送货物减少一半排放</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=70684\">首位通过干细胞移植疗法治愈艾滋病的女性</a></p></div>");