By an analytic method, in this essay a vector invariant of a casual point to a tetrahedron on volume and deductions form vector invariant are given.是什么意思_By an analytic method, in this essay a vector invariant of a casual point to a tetrahedron on volume and deductions form vector invariant are given.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句