document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=72056\">甲烷对全球变暖的敏感性比以前认为的高</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=72058\">世界首个用冻干皮肤细胞克隆的小鼠诞生</a></p></div>");