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オペレーションリサーチじゃありませんでした
operēshonrisāchijārimasendeshita

敬
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Noun
, 
Desu Copula

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

1. Was not operations research.; It was not operations research.

Past/Perfective
, 
Negative
, 
Polite
, 
Terminal Form

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オペレーションリサーチじゃありませんでした

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