单词	spread of Chinese
释义	spread of Chinese 汉语推广
随便看	grade difference grade differenee grade differential graded illumination graded impedance graded-impedance flier-plate graded impurity concentration graded index graded-index graded-index device graded-index devicegrin graded index dispersion-shifted single-m graded index fiber graded-index fiber graded index fiber caustic surface graded index fiber coupling efficiency graded index fiber coupling gain graded index fiber dispersion limit graded index fiber fabrication graded index fiber intermodal dispersion graded index fiber mode cutoff graded index fiber mode volume graded index fiber mumerical graded index fiber normalized frequency graded index fiber numerical aperture