fixed point observation造句

例句与造句

1. They are monitoring volcanic events on 110 active volcanos in Japan and 47 of these volcanos selected by the Coordinating Committee for Prediction of Volcanic Eruption are under the 24-hour observation with seismographs, accelerometers, GPS, air-shock recorders, fixed point observation cameras and other equipment.
2. It's difficult to find fixed point observation in a sentence. 用fixed point observation造句挺难的