| 单词 | F layer |
| 释义 | F layer (once / 11819311 pages) n WORD FAMILY F layer n the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission Syn|Exp Appleton layer, F region 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。