单词	trajectory
释义	trajectorytrajectory /trəˈdʒɛktəri/ noun (plural trajectories) [countable] Etymology ETYMOLOGYtrajectory Origin: 1600-1700 Modern Latin trajectoria, from Latin trajectus, past participle of traicere to cause to cross, from trans- ( ➔ TRANS-) + jacere to throw science, physics the curved path of an object that is fired or thrown through the air
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