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

富士达F等级Fujita等级  Fujita category

百分位数等级  percentile rank

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

等差数列  calculating formula; arithmetic progression; 153Sm-EDTMP

等差数列的公差  common difference

等级差  rank difference

等级差别  grade differential

等级级配  grade proportion

等级数集合分区  SPIHT

等级数量化  grade turned to quantity; grade-numberize

对数等级检定  log-rank tests

反差等级  contrast grade

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