<a class="" title="" href="../../../economics/2010-08/17/content_20726147.htm" target="_blank">2050年全球90亿人粮食不够吃改吃"人造肉"</a> <a class="" title="" href="../../../tech/2010-08/17/content_20725710.htm" target="_blank">两步制造</a> _中国发展门户网