C Q D
| 1.In radiotelegraphy, the letters signified by the code call formerly used (cf. S O S) by ships in distress, formed by combining the code call C Q (formerly used as a general call for all stations) with D for distress. |
英语词典包含2567994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。