visibility
/ˌvɪzəˈbɪlətɪ; ˌvɪzə`bɪlətɪ/ n[U]
1 fact or state of being visible 可见性; 明显性.
2 condition of the light or weather for seeing things at a distance 可见度; 能见度
Visibility was down to 100 metres in the fog. 大雾中能见距离已降至100米.
planes grounded because of poor/low/bad visibility 因能见度太差[低/坏]而停飞的飞机.