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放射 ほうしゃ性 せい同位 どうい元素 げんそではありませんでした
hōshaseido ui gensodewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of 放射性同位元素

1. Was not a radioisotope.; Was not a radioactive isotope.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register
, 
Physics

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放射性同位元素ではありませんでした

放射性同位元素ではありませんでした【ほうしゃせいどういげんそでわありませんでした】 Activity

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