暗线光谱 Traditional 暗線光譜 àn xiàn guāng pǔ 🔊 dark-line spectrum + Keep this word Meanings àn xiàn guāng pǔ 暗線光譜 dark-line spectrum Its characters 暗àndarkHSK 5线xiànthreadHSK 6光guānglight; ray (CL:道[dao4])HSK 4谱pǔchartHSK 7–9