研究与开发的英文:【计】 research and development 参考例句:The time-lag between research and development研究与开发之间相隔的时间.second, researching on, developing and promoting key and common technologies needed b
[经] technological economics [网络短语]技术经济学 Technological Economics,Technical Economics,Technology Economics 信息技术经济学 information technological economics,Economics of Information Technology 海洋技术经济学 marine t