| 单词 | f layer |
| 释义 | F layer[ ef-ley-er ] / ˈɛf ˌleɪ ər / noun Physics.the highest of the radio-reflective layers of the ionosphere, beginning at an altitude of about 80 miles (130 km) and consisting of two parts, the lower part (F1 layer ) being detectable in the daytime only, the higher (F2 layer, or Appleton layer ) being constant and constituting the ionospheric layer most favorable for long-range radio communication. Origin of F layerFirst recorded in 1925–30 Words nearby F layerflaxen, flax kit, Flaxman, flaxseed, flay, F layer, flaysome, F.L.B., fld., fl. dr., fldxt Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Scientific definitions for F layerF layer See F region. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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