vision range

• 视距； 能见度

vision range的用法和样例：

例句

1. With the range finder a bar with marking the several fixed distances must be affixed to the base of the tree.
   使用视距器时，必须在树基部附加一根指示几种固定距离棒。
2. There are also six sets of Runway Visual Range transmissometers to measure visibility conditions along the two runways.
   同时亦设置了六组跑道视程透射表以量度两条跑道的能见度。