不知不觉地陷入债务 slip into debt
A：He gambled heavily on the horses.
他在赛马上下了很大的赌注。
B：He didn't realize that he had begun to slip into debt.
他完全没有意识到他已经不知不觉地陷入债务了。
slip /sl?p/ v. 不知不觉地陷入（某种状况）；溜
realize /?r??la?z/ v. 意识到；认识到；了解
◆ slip into 不知不觉地陷入
◆ gamble on… 在……上下赌注；在……上打赌
还债 pay back the debt
A：I'll pay back the debt next month.
我下个月还债。
B：I thought that you had forgotten it.
我还以为你忘了呢。
■ “还债”还可以表示为：repay/discharge a debt。
还清债务 clear the debt
A：I hope you will clear your debt in two days.