Purpose To analyse the characteristics of mandibular incisor point chewing movement on frontal planeorbit in youth of normal occlusion.
目的分析正常(牙合)青少年下颌切点额状面咀嚼运动轨迹的特征。
2
In order to guarantee the characteristics of frozen orbit, in-planeorbit control needs to adjust the semi-major axis, eccentricity, argument of perigee simultaneously.
为了保证冻结轨道的冻结特性，平面内轨道控制需要对半长轴、偏心率和近地点幅角都控制。
3
All the planets orbit the Sun in roughly the same plane, around its equator.