例文
- The magnetic horn ( also known as the " Van der Meer horn " ) is a high-current, pulsed focusing device, invented by the Dutch physicist Simon van der Meer at CERN . It selects pions and focuses them into a sharp beam.
- Instead of a sharp beam of light, it's testing technology from Sensar Inc . in Moorestown, New Jersey that uses a camera to scan an iris from up to three feet away and check for a match with its file of so-called iris prints within two seconds.
