The action or process of sounding or ascertaining the depth of water or of an object below a ship by meauring the time taken for a transmitted…
The location of objects by means of the echo reflected from them by a sound-signal, as of ultrasonic sounds emitted by bats or by man-made devices.
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。