轨道长度 meaning in English

track length

The " length of track calculation " section of the dialog allows you to choose the length of the displayed ground track ; you can either display a track for a single orbit of the object , or you can manually enter the length of the track , and the interval at which positions are to be calculated
“轨道计算的长度”用于选择需要显示的地面轨迹的长度；你可以选择绕地一周的地面轨迹，也可以通过输入相应的轨道长度来显示在一个时间段内的轨道地面轨迹。
The magnetic distribution of a - magnet is presented by analytic way and numeric simulation way . the single particle movement is studied in a - magnet and the movement rule of charged particle in ideal four poles magnetic field also is obtained . quantificational results of the incidence angle , trajectory length and the maximal distance in x direction are presented for ideal trajectory , and the equation indicates some important characters of a - magnet
论文对-磁铁的有关物理问题进行了较为详细的论述，从解析形式和数值模拟两个方面给出了-磁铁的磁场分布，对单个粒子在-磁铁中的运动进行了分析，利用数值求解方法研究了带电粒子在理想四极磁场中的运动规律，提出了归一化运动方程和理想轨道等物理概念，定量给出了消色散的入射角、轨道长度和x方向最大距离的解析表达式。