Foreground apps are apps that have

Foreground apps are apps that have user interactivity.

Results (Chinese Traditional) 1:

前台應用程序是具有用戶交互的應用程序。

Results (Chinese Traditional) 2:

前臺應用是具有使用者交互性的應用。

Results (Chinese Traditional) 3:

前臺應用程序是具有用戶互動功能的應用程序。