[數(shù)] 射影面束 pencil of planes: 面束projective pencils of planes: 射影面束axis of a pencil of planes: 平面束的軸harmonic pencil of planes: 調(diào)和面束projective pencil of lines: 射影線束下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
