noun🔗Share声呐，回声定位 Echolocation"The bat used its sonar to find its way through the dark cave. "蝙蝠用它的声呐（回声定位）在黑暗的洞穴里辨别方向。technologynauticalsoundcommunicationelectronicssignalmachinedeviceoceanmilitaryChat with AIVocabulary GamePractice Reading
noun🔗Share声呐, 水声定位仪 A device that uses hydrophones (in the same manner as radar) to locate objects underwater."The fishing boat used sonar to find schools of fish beneath the surface. "渔船使用声呐（水声定位仪）来寻找水面下的鱼群。technologyelectronicsdevicenauticaloceanmilitarysciencesoundmachinesignalChat with AIVocabulary GamePractice Reading
