document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=77067\">精子在生殖竞争中会互相合作</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=77069\">白宫召开会议讨论纳瓦霍国对将人类骨灰送往月球的异议</a></p></div>");