1
the letter D
表示字母D本身，大写为D，小写为d。
The first letter of the word is 'd'.
这个词的第一个字母是d。
D；字母D
D−'s — plural of d
先理解核心含义，再看它在真实句子里的用法。
D；字母D
the 4th letter of the Roman alphabet
The first letter of the word is 'd'.
这个词的第一个字母是d。
规范分解
Canonical decomposition
在开球时,母球必须放置在球台上半圆区域内
The semicircle on the baulk line, inside which the cue ball must be placed at a break-off.
某些机构给出的学术成绩,略好于D,略差于C-。
An academic grade given by certain institutions. Slightly better than a D and slightly worse than a C-.
某些机构给出的学术成绩,比E+稍好,比D稍差。D-有时是最低的及格分数
An academic grade given by certain institutions. Slightly better than an E+ and slightly worse than a D. D minuses are sometimes the lowest passing grades.
She wrote a small d next to her name on the list.
她在名单上自己的名字旁边写了一个小写的 d。
The password must contain at least one capital D.
密码中必须至少包含一个大写字母 D。
My initial is D, short for Daniel.
我名字的首字母是 D，是 Daniel 的缩写。
表示字母D本身，大写为D，小写为d。
The first letter of the word is 'd'.
这个词的第一个字母是d。
强调大写形式。
Please write your name with a capital D.
请用大写D写你的名字。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
字母D
The word 'dog' starts with the letter D.
单词'dog'以字母D开头。
大写字母D
Please write your name with a capital D.
请用大写字母D写你的名字。
小写字母d
The small d looks like a circle with a line.
小写字母d看起来像一个圆加一条线。
Use D−'s naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
字母d形似弯弓，读音似'迪'。
字母d作为英语字母表第四个字母，通常用于拼写、排序、符号表示等中性场合，无特殊语体限制。
表示罗马字母表中的第四个字母，常缩写为D。
Dictionary facts from ECDICT, WIKTIONARY.