“shadow zone”的概念、定义、翻译、参考文献-科学参考

单词	shadow zone
释义	shadow zone [`shad·ō ´zōn] ^ACOUSTICS A region, usually under water or in the atmosphere, which sound waves will not reach, according to ray acoustics. ^GEOPHYSICS The zone, between 103 and 143° from the epicenter of an earthquake, in which direct seismic waves do not arrive because of refraction and absorption by the earth's core.
随便看	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 International Polar Year international practical temperature scale International Quiet Sun Year international radio silence international rules of the road

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