plane angle of a dihedral angle的: 4次方是 The fourth power of 2 i ...二面角的棱: edge of a dihedral angle二面角的面: dihedral face平面二面角: plane dihedral angle二面角,雙面角: dihedral angle下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯