| 单词 | echo-plummet |
| 释义 | > as lemmasecho-plummet echo-plummet n. [ 1d] a radio sounder for measuring height above ground level or the depth of water in the sea. ΚΠ 1931 Flight 27 Mar. 274/2 The echo-plummet used extensively for maritime navigation seems to encounter certain difficulties in aeroplanes. 1933 Discovery Oct. 307/1 The well known acoustic echo plummet which is employed in measuring ocean depths. < as lemmas |
| 随便看 |
|
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。