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