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活性 かっせい酸素 さんそではありませんでした
kasseisansodewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of 活性酸素

1. Was not active oxygen.; Was not a reactive oxygen species.

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

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活性酸素ではありませんでした

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