alternating operating system

例句：

1. 1. The team members alternated in the roles of captain and vice-captain.
   团队成员轮流担任队长和副队长。
2. 2. They alternated between playing basketball and watching movies.
   他们交替进行篮球比赛和看电影。
3. 3. The alternating light and shadow created a dramatic effect on the stage.
   交替的光与影在舞台上创造了戏剧性的效果。