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オペレーションズリサーチじゃありませんでした
operēshonzurisāchijārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of オペレーションズリサーチ

1. Was not operations research.; It wasn't operations research.

Past/Perfective
, 
Negative
, 
Polite
, 
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