confocal◇共焦曲线 confocal curves; 共焦坐标 confocal coordinates共: common; joint; mutual; gener ...焦: burnt; scorched; charred共焦系, 共焦族: confocal family非共焦: non-confocal共焦的: confocal; homocentric下载手机词典可随时随地查词查翻译