| 释义 |
D, d/di; diː/ n [C,U] plural D's , d's 1 the fourth letter of the English alphabet 英语字母表的第四个字母 2 the second note in the musical SCALE of C MAJOR , or the musical KEY based on this note D 音 〔C 大调音阶中的第二音〕﹔D 调 3 a mark given to a student's work to show that it is not very good D 级﹐丁级﹐丁等〔表示学习成绩不太好〕﹕
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