Each button caused an activity to start and would run for an indeterminate length of time.
Each button caused an activity to start and would run for an indeterminate length of time.
每个按钮都可以启动并运行一定长度的时间。
Each button caused an activity to start and would run for an indeterminate length of time.
每个按钮都可以启动并运行一定长度的时间。