| 单词 | echolocate |
| 释义 | > as lemmasˈecholocate ˈecholocate v. ΘΚΠ the mind > attention and judgement > discovery > instrument for detection > of instrument, etc.: detect [verb (transitive)] > locate or track radiolocate1941 echolocate1944 to lock on to ——1945 radar-track1948 acquire1953 echo-sound1953 1944 D. R. Griffin in Science C. 590/1 A radio signal is sent out from the airplane and electronic devices measure the time required for this signal to be reflected back... Finally we have radar, a refinement of the radio altimeter so beautifully perfected that it can echolocate airplanes at great distances by sending out radio waves and picking up the reflected energy returning from the distant aircraft. 1959 Observer 14 June 5/4 Asdic, another wartime device used for echolocating underwater objects by ultrasonic vibrations, has given us more knowledge about whales. < as lemmas |
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