alternate device

例句：

1. 1. The two teams will play a game of basketball in the afternoon.
   两队将在下午进行一场篮球比赛。
2. 2.He alternated between studying and playing video games during his vacation.
   他在假期里交替地学习与玩电子游戏。
3. 3. They decided to alternate their schedules, so one day they would work while the other day they would study.
   他们决定交替安排日程，所以有一天他们会工作，而另一天则会学习。