visual indicator

基本解释

This setting displays a visual indicator on the iPhone UI that there is network activity in progress.
如此设置就可以在 iPhone UI 上显示一个可见的指示器，表示有网络活动正在进行。
The problem is that there’s no visual indicator of which apps are running, nor is there an easy way to exit them or force them to close.
Android存在的问题是，没有明确的指示哪些应用程序是正在运行的，也没有一个简单的方法来退出或强制关闭。
As you drag a new widget onto the canvas, the editor provides a visual indicator, a green area color, and an outline view to help you place the widget where you want it.
在将新的小部件拖到这个 canvas 上时，编辑器会提供一个可视的指示器（一个绿色的区域颜色）以及一个 outline 视图以帮助将这个小部件放在理想的位置。

"This kind of visual indicator is a great step, but alone it's not enough, " she says.
FORBES: Spear The Phishers--Not The Fish
There's also a handful of elements that we seldom see in these apps, such as a direction-relative wind indicator, optional motion-driven navigation and visual themes.
ENGADGET