vector invariant造句

例句与造句

1. 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
   摘要利用解析法，给出空间任意一点与四面体体积有关的一个向量恒等式，并给出若干推论。
2. It's difficult to find vector invariant in a sentence. 用vector invariant造句挺难的