n.垂心
orthocenters───n.垂心
orthocentres───n.[数]垂心
orthocentre───n.[数]垂心
youth center───青年中心；青年厅堂；青年活动中心
orthopter───n.平齐翼飞机
chromocenter───n.[遗]染色中心，染色质核仁；核粒
optic center───光心
orthogenetic───直向演化的（orthogenesis的变体）
control center───n.控制中心；调度室
The method is greatly improved on an old one by calculating traverse error orthocenter, coordinate transformation and separation.───该方法通过求导线误差重心，坐标变换和分离的手段对原方法作了重大的改进，从而使计算变得简单。
The method is greatly improved on an old one by calculating traverse error orthocenter, coordinate transformation and separation. so as to make the calculation easier.───两个向量法相关公式探讨了三角形重心、垂心、外心以及内心之间的距离公式。
Some Results about Median Point of Any Polygon and Orthocenter of Any Inscribed Polygon of a Circle───关于多边形的顶点重心与圆内接多边形的垂心的若干结论
This paper explores into the distance formula between median point, orthocenter, circumcenter and inner point of triangle by means of two related formulas of vector methods.