free activity period

例句：

1. 1.During the free activity period, students can participate in various activities.
   在自由活动时间内，学生可以参加各种活动。
2. 2.The school has set up a free activity period for students to relax and unwind.
   学校为学生设置了自由活动时间，以便放松和减压。
3. 3. During the free activity period, students are encouraged to explore their interests and hobbies.
   在自由活动时间内，鼓励学生探索自己的兴趣和爱好。