高阶等差级数
arithmetic series of higher order
等差等比级数
arithmetrico-geometric series
等差条纹级数
isochromatic fringe values
Photoclasticity
等差-等比循环矩阵
The inverse matrices of cyclic matrices
等差-等比循环矩阵的逆矩阵
Arithmetrico-gepmetric cyclic matrices
复原就绪等级数据库
recovery-readiness-level database
高等级数字用户圈
HRDSL High Rate Digital Subscriber Loop
高阶等差数列
arithmetic progression of higher order
high-order arithmetical series
higher order arithmetic sequence