visibility

n.可见度; 能见度; 能见距离; 可见性; 明显性 牛津词典 noun 可见度；能见度；能见距离how far or well you can see, especially as affected by the light or the weather good/poor/bad/zero visibility 能见度高 / 低 / 差 / 为零 Visibility was down to...