我司假定第十年仍有80%；除非第6或7年的電池成本大幅下降，否則不建議

我司假定第十年仍有80%；除非第6或7年的電池成本大幅下降，否則不建議提前替換。

結果 (英文) 1:

Our company assumes that there is still 80% in the tenth year; unless the battery cost in the 6th or 7th year has dropped significantly, it is not recommended to replace it early.

結果 (英文) 2:

Our company assumes that there is still 80% in the tenth year; It is not recommended to replace the battery in advance unless the battery cost in the 6th or 7th year decreases significantly.

結果 (英文) 3:

I assume that there will still be 80% in the tenth year; It is not recommended to replace the battery in advance unless the cost of the battery in the 6th or 7th year drops significantly.