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効率 こうりつではありませんでした
kōritsudewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of 効率

1. Was not efficient.; Was not effective.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register

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効率ではありませんでした

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