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ケイ酸 けいさんではありませんでした
keisandewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of ケイ酸

1. Was not silicon.; Was not silica.

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

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ケイ酸ではありませんでした

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