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operations research
operations room operatise operative operatively operatize operator opercula opercular operculate operculated operculation operculiform operculigenous operculum operetta operettist operon operose operoseness ophidian ophidism ophiocephalous ophiolater ophiolatrous ophiolatry ophiologic ophiological ophiologist ophiology |
operations research /,ɔpə'reiʃnzri'sə:tʃ/
danh từ
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