暗線光譜

ànxiànguāngpǔ

dark-line spectrum

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àn xiàn guāng pǔ

n. dark line spectrum

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an4 xian4 guang1 pu3

dark-line spectrum

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暗線光譜|暗线光谱 [àn xiàn guāng pǔ] ► dark-line spectrum