visibility of a point

例句：

1. 1. The new building is so tallthat it blocks the view of the skyscrapers below.
   这座新建筑非常高，以至于它挡住了下面摩天大楼的景色。
2. 2. The visibility ofthe stars in the night sky is quitelow.
   夜晚天空中星星的可见度很低。
3. 3. The scientist's research has greatlyimproved our understanding of the visibilityof light through clouds.
   科学家的研究极大地提高了我们通过云层对光的可见性的理解。