回声 huíshēng echo Definitions Defs Origin Strokes Stroke Words Sentences Sents 回声定位 huíshēngdìngwèi echolocation Biological or technological use of sound waves and their echoes to determine the location of objects回声探测仪 huíshēngtàncèyí echo sounder electronic device for locating underwater objects or measuring depth by using reflected sound waves
