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プルトニウム２ に３ さん９ きゅうではありませんでした
purutoniumuni sankyūdewa arimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of プルトニウム２３９

1. Was not plutonium-239.; It was not plutonium-239.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register

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プルトニウム２３９ではありませんでした

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