资料来源 : pyDict

声纳

资料来源 : WordNet®

sonar
     n : a measuring instrument that sends out an acoustic pulse in
         water and measures distances in terms of the time for the
         echo of the pulse to return; sonar is an acronym for
         sound navigation ranging; asdic is an acronym for
         anti-submarine detection investigation committee [syn: {echo
         sounder}, {asdic}]