实行宵禁

例句：

1. 1. The city has a strict curfew from 9 pm to 5 am.
   这个城市从晚上9点到早上5点实施宵禁。
2. 2. During the war, soldiers were required to follow the curfew strictly.
   战争期间，士兵们被要求严格遵守宵禁。
3. 3. Many students choose to stay indoors during the day and go out at night for exercise.
   许多学生选择白天待在室内，晚上出去锻炼。