Three algorithms are presented for computing the shortest path between two arbitrary points on a polyhedral surface: One is an approximate algorithm;
提出计算多面体面上任意两点之间最短路径的算法：近似算法、最短路径或近似最短路径算法。
The theorem of projection of acceleration has been presented in this paper. According to the theorem, projection relation of acceleration of arbitrary two points on the plane figure is built.
本文提出了“加速度投影定理”，根据这一定理，建立了平面图形上任意两点加速度的投影关系。
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