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’.