名词短语
中文翻译：光谱线变窄
同义词：
['spectral line broadening', 'spectral line widening']
例句：
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1. The spectrum of light from the sun is a fascinating study of energy.
太阳光的光谱是研究能量的一个迷人课题。
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2. As the temperature drops, the spectral line narrows.
随着温度下降，光谱线变窄。
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3.The researcher observed that the spectral line narrowed as the wavelength increased.
研究者观察到，随着波长的增加，光谱线变窄。