“anacoustic zone”的概念、定义、翻译、参考文献-科学参考

单词	anacoustic zone
释义	anacoustic zone [¦an·ǝ¦kü·stik ´zōn] ^GEOPHYSICS The zone of silence in space, starting at about 100 miles (160 kilometers) altitude, where the distance between air molecules is greater than the wavelength of sound, and sound waves can no longer be propagated.
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