| 单词 | D region |
| 释义 | D region (extremely rare) n WORD FAMILY D region n the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves Syn|Exp D-layer part, region the extended spatial location of something |
| 随便看 |
|
英语词典包含147318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。