sightings是什么意思？

sightings

例句

• The police are now following up a number of reported sightings of the missing woman’s car. 有多项报告说看见失踪妇人的汽车，警方正在进行调查。
• There has been a surge of UFO sightings in America. 美国不明飞行物目击事件激增。
• Have had a shocking UFO sighting or multiple sightings in your life. 在生活中有很多令人震惊的不明飞行物的景像或多个景像.
• The National Weather Service has reported several tornado sightings in Illinois. 美国国家气象局报道说在伊利诺伊州出现了几次龙卷风。