1、When I make that final payment I shall be clear of all debts.
當(dāng)我付了那最后一筆款子，我將償還了所有的債務(wù)。

2、the final payment of a debt.
償清債務(wù)的最后一筆錢款。

3、the final payment of a debt
償清債務(wù)的最后一筆錢款。