N-COUNT (尤指对不寻常或意外事物的)所见，目睹 A sighting of something, especially something unusual or unexpected is an occasion on which it is seen. (尤指对不寻常或意外事物的)所见，目睹
...the sighting of a rare sea bird at Lundy island. [+ of]
在兰迪岛上看到一种珍稀海鸟
The National Weather Service has reported several tornado sightings in Illinois.