retroactive

adj.可追溯的

retouch, retrace, retract, retractability, retractable, retractile, retraction, retread, retreat, retrench, retrenchment, retrial, retribution, retributive, retrievable, retrieval, retrieve, retriever, retro-, retro-rocket, retroactively, retroflex, retrograde, retrogress, retrogression, retrogressive, retrogressively, retrospect, retrospection, retrospective, retrospectively, retrousse, retry, retsina, return, return address, return fare, return game, return match, return ticket, return to...,