alternation activity

例句：

1. 1. The team's performance during the game was characterized by alternation activities.
   在比赛中，该团队的表现特点在于交替活动。
2. 2. During the summer vacation, she alternated between reading books and playing sports.
   暑假期间，她交替阅读书籍和进行运动。
3. 3. The alternation of light and dark created a beautiful contrast in the landscape.
   光与暗的交替创造了风景中美丽的对比。