Definition
At all times; continuously, without stopping.
日夜不停
They worked day and night to meet the deadline.
他们不分昼夜地工作以赶上截止日期。
Hospital staff are caring for patients day and night.
医院的工作人员不分昼夜地照顾病人。
That restaurant is open day and night without rest.
那家餐厅不分昼夜地营业，没有休息。