opev.开放;自由进出(动词open的古体)=open.
operculum insulae岛盖
opercular process[医] 岛盖突
opercular chamber鳃盖腔,鳃室
opertion analysis运行分析
Opephora pacifican.太平洋槌棒藻
operon hypothesis操纵子学说
operculum dentale牙盖
opercular aperture鳃孔
operplate printing金属印刷
Operophtera fagatan.栎秋尺蛾