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概念 がいねん実証 じっしょうではありませんでした
gainenjisshōdewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of 概念実証

1. Was not a proof of concept.; It was not a proof of concept.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register

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概念実証ではありませんでした

概念実証ではありませんでした【がいねんじっしょうでわありませんでした】 Activity

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