tra·jec·to·ry
noun/trəˈdʒektəri/
/trəˈdʒektəri/
(plural trajectories)
(specialist)- the curved path of something that has been fired, hit or thrown into the air
（射体在空中的）轨道，弹道，轨迹 - a missile’s trajectory
导弹的弹道 - (figurative) My career seemed to be on a downward trajectory.
我的事业似乎在走下坡路。
Word Originlate 17th cent.: from modern Latin trajectoria (feminine), from Latin traject- ‘thrown across’, from the verb traicere, from trans- ‘across’ + jacere ‘to throw’. - a missile’s trajectory