operan.歌剧n.挪威Opera软件公司的浏览器软件
operable wall开闭式间壁
operating cam操纵凸轮
operating lam手术照明灯
operating log作业志
opera writers曲家
opera-going去歌剧院(看歌剧)
operating ram动作筒
operating lag响应延迟
operating cap手术帽
operating cab操纵室,司机室