triangular pyramid短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 三棱锥 This paper studies the location relation of orthocenter, center of gravity and circumcenter of orthogonal triangular pyramid, and obtains the Euler Line theorem of orthogonal triangular pyramid. 研究了正交四面体中的垂心、重心和外心的位置关系，证明了正交四面中的欧拉线定理。 cnki We will see if MIT comes up with a triangular pyramid building. 我们过几年在看看 MIT会不会建起一栋金字塔。163