| 释义 | 
             
                paraxial trajectory
                
            弹道dàn dào 
 ballistic trajectory, trajectory轨线guǐ xiàn 
 trajectory傍轴光线bàng zhóu guāng xiàn 
 paraxial ray傍轴近似bàng zhóu jìn sì 
 paraxial approximation轨迹guǐ jì 
 locus; path; track; trajectory路径lù jìng 
 way; route; trajectory; path; tail; travel; method下降段xià jiàng duàn 
 descent stage; descending branch; descent trajectory
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