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人工 じんこう放射 ほうしゃ性 せい同位 どうい体 たいではありませんでした
jinkōhōshaseidō itaidewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of 人工放射性同位体

1. Was not artificial radioactive isotope.; Was not an artificial radioisotope.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register

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人工放射性同位体ではありませんでした

人工放射性同位体ではありませんでした【じんこうほうしゃせいどういたいでわありませんでした】 Activity

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