“optical spectra”的概念、定义、翻译、参考文献-科学参考

单词	optical spectra
释义	optical spectra [`äp·tǝ·kǝl `spek·trǝ] ^SPECTROSCOPY Electromagnetic spectra for wavelengths in the ultraviolet, visible and infrared regions, ranging from about 10 nanometers to 1 millimeter, associated with excitations of valence electrons of atoms and molecules, and vibrations and rotations of molecules.
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