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N-VAR
英語字母表的第 4 個字母
D is the fourth letter of the English alphabet.
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N-VAR
C 大調音階中的第二音;D 音
In music, D is the second note in the scale of C major.
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N-VAR
(作業、考試成績等的)丁等，D等，差
If you get a D as a mark for a piece of work or in an exam, your work is below average or poor.
例句
I got a D+.
我得了個 D+。
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(用于墓碑上或工具書中等的日期前)
d. is an abbreviation for (縮略=) died when it is written in front of dates, for example on graves or in reference books.
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(英國1971年前使用的舊制輔幣)
d was a written abbreviation for (書面縮略=)penny or pence in Britain before decimal currency was introduced in 1971.
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(用于首字母為 d 的一些單詞的縮寫，如 day, defeated或district）
D or d is used as an abbreviation for words beginning with d, such as 'day', 'defeated', or 'district'.