D, d

n (pl D's, d's / di:z; diz/) 1 the fourth letter of the English alphabet 英语字母表的第四个字母: `David' begins and ends with a `D'/D. David一字的开头和结尾都是D. 2 D (music 音) the second note in the scale of C major C大调音阶中的第二音或音符. 3 D academic mark indicating a low standard of work 学业成绩为低等的评价符号.

cylinder, cylinder block, cylinder head, cylindrical, cymbal, cynic, cynical, cynically, cynicism, cynosure, cypher, cypress, Cyrillic, cyst, cystitis, czar, czarina, Czech, D, D (also d), D-day, D.A., D/A, DA, dab, dabble, dabbler, dabbling, dabchick, dace, dacha, dachshund, Dacron, dactyl, dactylic, dad, daddy, daddy-long-legs, dado, daemon,