YOU SAID:

How long does this thing need to be until it never reaches equilibrium

INTO JAPANESE

平衡に達することがなくなるまで、このことはどのくらいの期間である必要がありますか

BACK INTO ENGLISH

How long does this need to be before equilibrium is reached?

INTO JAPANESE

平衡に達するまでにどれくらいの時間が必要ですか？

BACK INTO ENGLISH

How long does it take to reach equilibrium?

INTO JAPANESE

平衡に達するまでどのくらいかかりますか？

BACK INTO ENGLISH

How long does it take to reach equilibrium?