trajectory

n curved path of sth that has been fired, hit or thrown into the air, eg a missile （抛射体, 如导弹的）弹道, 轨迹, 轨道: a bullet's trajectory 子弹的弹道.

tragicomic, trail, trail off, trail-blazer, trail-blazing, trailer, train, train compartment, train set, train-bearer, train-spotter, trainee, trainer, training, training-college, trainman, traipse, trait, traitor, traitorous, tram, tramlines, trammel, trammels, tramp, trample, trampoline, trance, tranquil, tranquility, tranquilize, tranquilizer, tranquillity, tranquillity (US also tranquility), tranquilly, trans, trans-, transact, transaction, transatlantic,