射影對應(yīng)，射影射影關(guān)系投射傾向直射direct projectivity: 正射影變換elliptic projectivity: 橢性直射hyperbolic projectivity: 雙曲性直射opposite projectivity: 反向射影parabolic projectivity: 拋物性射影下載手機詞典可隨時隨地查詞查翻譯
