| 单词 | F layer |
| 释义 | F layer [`ef ´lā·ǝr] GEOPHYSICS An ionized layer in the F region of the ionosphere which consists of the F1 and F2 layers in the day hemisphere, and the F2 layer alone in the night hemisphere; it is capable of reflecting radio waves to earth at frequencies up to about 50 megahertz. |
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