| 释义 |
F layern.（名词）- The highest zone of the ionosphere, extending at night from about 190 to 400 kilometers (120 to 250 miles) and during the day from about 145 to 400 kilometers (90 to 250 miles) above the earth's surface. Also called F region F电离层：电离层中最高的一层，夜间从离地球表面约190公里处延伸到400公里处（120到250英里）白天从离地球表面约145公里处延伸到400公里处（90到250英里） 也作 F region
- Either of two layers, designated F1 and F 2, into which the F layer is divided during the day, extending respectively from about 145 to 240 kilometers (90 to 150 miles) and from about 190 to 400 kilometers (120 to 250 miles) above the earth's surface. F电离层：F层在白天分布的名为F1层和F 2层中的任一层，分别从地球表面约145公里处延伸到240公里处（90英里到150英里）和从约190公里处延伸到400公里处（120英里到250英里）
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