名词
中文翻译：可见弧
同义词：
['visual arc', 'visible arc例句：1. The arc of visibility is the distance from the observer to the object.（可见弧是从观察者到物体的距离。）']
例句：
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1. The arc of visibility is the distance from the observer to the object.
可见弧是从观察者到物体的距离。
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2.The arc of visibility can be used to measure the angle between two objects.
可见弧可以用来测量两个物体之间的夹角。
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3.The arc of visibility is important for navigation and photography.
可见弧对于导航和摄影非常重要。