9 词条主页 > 词条 > 拉丁美洲西班牙语 (XL) > borde de absorción
borde de absorción
Sudden rises superposed on the smooth decrease of the curve of the attenuation coefficient, which cause the curve to have a typical sawtooth aspect. They generally occur at the limit of spectral lines.
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deriva genética
Changes in the frequencies of alleles in a population that occur by chance, rather than because of natural selection.
