“D layer”的概念、定义、翻译、参考文献-科学参考

单词	D layer
释义	D layer [`dē ´lā·ǝr] ^GEOLOGY The lower mantle of the earth, between a depth of 600 and 1800 miles (1000 and 2900 kilometers). ^GEOPHYSICS The lowest layer of ionized air above the earth, occurring in the D region only in the daytime hemisphere; reflects frequencies below about 50 kilohertz and partially absorbs higher-frequency waves.
随便看	internal wave internal work international ampere international analysis code international angstrom international atomic time international broadcasting international cable code international call sign international candle international code signal international control frequency bands international control station International Critical Tables international date line international ellipsoid of reference international fixed public radio communications service International Geophysical Year international gravity formula international henry International Ice Patrol international index numbers international Morse code international nautical mile international ohm

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