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有効 ゆうこう利用 りようじゃないです
yūkōriyōjanaidesu

敬
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Noun
, 
Desu Copula
, 
Negation Auxiliary

The polite negative form of 有効利用

1. Not effective use.; It's not used effectively.

Negative
, 
Polite
, 
Casual Register

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有効利用じゃないです

有効利用じゃないです【ゆうこうりようじゃないです】 Activity

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