someone who observes to ensure fairness or prevent mistakes
Warning centres like the one in Hawaii in the Pacific Ocean are needed all over the world to monitor underwater quakes and alert the ever-growing coastal populations.
Warning centres like the one in Hawaii in the Pacific Ocean are needed all over the world to monitor underwater quakes and alert the ever-growing coastal populations.
Warning centres like the one in Hawaii in the Pacific Ocean are needed all over the world to monitor underwater quakes and alert the ever-growing coastal populations.
Warning centres like the one in Hawaii in the Pacific Ocean are needed all over the world to monitor underwater quakes and alert the ever-growing coastal populations.