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プルトニウム２ に３ さん９ きゅうです
purutoniumuni sankyūdesu

敬
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Noun
, 
Desu Copula

The polite form of プルトニウム２３９

1. Plutonium-239 is. ; ; It is plutonium-239.

Polite

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プルトニウム２３９です

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