由于特殊原因，会议改到下周举行。

Under special ___circumstances, the meeting was rescheduled to next week.

他的经济状况不允许他购买那辆车。

His financial ___circumstances don't allow him to buy that car.

在特殊情况下，我们可以延后截止日期。

Under special ___circumstances, we can extend the deadline.