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有効 ゆうこう期間 きかんではありません
yūkōkikandewārimasen

敬
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Noun
, 
Desu Copula
, 
Negation Auxiliary

The polite negative form of 有効期間

1. Not valid.; Not in effect.

Negative
, 
Polite
, 
Formal Register

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有効期間ではありません

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