昼夜
HSK 7-9day and night; 24 hours; 24
Explanation
period of 24 hours; continuously, without stop
Examples
白天黑夜
Day and night
从早到晚
From morning till evening
day and night; 24 hours; 24
period of 24 hours; continuously, without stop
白天黑夜
Day and night
从早到晚
From morning till evening