“extreme narrowing approximation”的概念、定义、翻译、参考文献-科学参考

单词	extreme narrowing approximation
释义	extreme narrowing approximation [ek`strēm `nar·ǝ·wiŋ ǝ´präk·sǝ`mā·shǝn] ^SPECTROSCOPY A mathematical approximation in the theory of spectral-line shapes to the effect that the exchange narrowing of a perturbation is complete.
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