暗線光譜 àn xiàn guāng pǔ

DEFINITIONS

  1. dark-line spectrum

CHARACTERS

暗 àn
HSK 5
dark; obscure; in secret, covert
線 xiàn thread, line, wire; clue
光 guāng
HSK 4
light, brilliant, shine; only
譜 pǔ register, list, table; musical score