D

noun

1. 英语字母表的第4个字母
   the fourth letter of the English alphabet
   1. ‘Dog’ begins with (a) D/‘D’.
      dog一词以字母d开头。
2. D音（C大调的第2音或音符）
   the second note in the scale of C major
3. （学业成绩）第四等，差
   the fourth highest mark/grade that a student can get for a piece of work, showing that it is not very good
   1. He got (a) D/‘D’ in/for Geography.
      他的地理成绩得D。

abbr.

1. 民主党人；民主党的
   Democrat ; Democratic

symbol

1. （罗马数字）500
   the number 500 in Roman numerals

1. 英语字母表的第 4 个字母
   D is the fourth letter of the English alphabet.
2. C 大调音阶中的第二音;D 音
   In music, D is the second note in the scale of C major.
3. N-VAR (作业、考试成绩等的)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.
   1. I got a D+.
      我得了个 D+。
4. (用于墓碑上或工具书中等的日期前)
   d. is an abbreviation for (缩略=) died when it is written in front of dates, for example on graves or in reference books.
5. (英国1971年前使用的旧制辅币)
   d was a written abbreviation for (书面缩略=)penny or pence in Britain before decimal currency was introduced in 1971.
6. (用于首字母为 d 的一些单词的缩写，如 day, defeated或district）
   D or d is used as an abbreviation for words beginning with d, such as 'day', 'defeated', or 'district'.

1. I got a D+.
   我得了个D+。
2. I had a sense of d é j à-vu because I could recognise everything in London.
   我有一种似曾相识的感觉，因为我能认出伦敦的一切。
3. In figure 24 'D' denotes quantity demanded and 'S' denotes quantity supplied.
   在图24中，D代表需求量而S代表供应量。
4. Decide whether the ball is in square A, B, C, or D, then call and leave your answer
   选定球放在A、B、C、D哪个方格，然后打电话来，留下您的答案。
5. She went from a D in her mocks to a B in the real thing.
   她模拟考试得了D，到了真正考试的时候却拿了个B。
6. If the note of D is sounded on a harp, all the corresponding D strings of other octaves will likewise resonate.
   如果用竖琴演奏D音符，其他八度音阶所有相应的D弦都将发出共鸣。
7. This special form of vitamin D is naturally present in breast milk
   这种特殊形态的维生素D天然存在于母乳中。
8. The second quotation is from an essay that D H Lawrence wrote in the nineteen-twenties.
   第二段引文出自D.H.劳伦斯20世纪20年代写的一篇文章。
9. This kind of lighting encourages vitamin D synthesis in the skin.
   这种光照会促进皮肤中维生素D的合成。
10. Butter, margarine, and oily fish are all good sources of vitamin D.
    黄油、人造黄油和多脂鱼都含有丰富的维生素D。
11. The trend of d é tente cannot be reversed.
    和解的潮流不可逆转。
12. Trombones sharply pronounce a d, followed by tuba and oboe in a sudden diminuendo.
    长号尖锐地吹出一个d音，之后是大号和双簧管的突然的渐弱演奏。
13. He broke a leg and was~ d for a month.
    他跌断了一条腿，要留医一个月。
14. The teacher~ d as he looked at my work.
    老师看着我的作业就皱起了眉头。
15. Catagensis is marked by a loss of hydrogen, and consequently by a decrease of the h/ c ratio.
    后生阶段以氢减少必然导致h／d比率降低为特征。
16. The coup d 'é tat aborted.
    政变未遂。
17. Can you go down to a low d?
    你能降到低音d吗？
18. Antibodies were used in the macrophage system to inhibit cathepsin D.
    巨噬细胞系统中使用了抗体来抑制组织蛋白酶d。
19. I? d like to tell you that you can come to work for us.
    我想通知你你可以来我们公司工作了。
20. B is now distinctly slower than A, C, and D.
    B现在明显比A、C和D慢。
21. In this case, the files are defined in/ etc/ rc2. d/.
    在本例中，文件都是在/etc/rc2.d/中定义的。
22. "I think action takes place in part D, too," Helen suggested.
    “我认为行动在D部分也发生了。”Helen提出。
23. MDA/ D further elevates the levels of abstraction and reuse.
    MDA/D进一步提高了抽象和重用的级别。
24. Most American colleges and universities use the grading system of A, B, C, D and F.
    美国大多数学院和大学使用A、B、C、D和F的评分系统。
25. I have a strong R& D and corporate management teams and improve the management system.
    我公司拥有一支强大的研发及管理队伍和完善的管理体系。
26. We just d disagreement that's all.
    我们只是有了一点争执。
27. You have some code in D that says infoof ( Bar ( int, int)).
    你在D中的一些代码里用了infoof（Bar（int，int））。
28. Encodings for base class, sub-class, and programming interface are provided in Appendix D.
    附录D提供了基类、子类和程序接口的具体编码。
29. I connected with this guy ed D.
    我和这个叫d的家伙谈了。