1.
In statistical attacks on ciphers the known frequency of various bigrams, in a given language, can be used in attempts to break the cipher.
在对密码的统计攻击中，可用已知语言的各双字母组的频度来攻破密码。
2.
Any combination of three letters of an alphabet.
字母表中任意三个字母的组合
3.
A three-letter word or word element.
三字母词由三个字母组成的词或词根、音节
4.
sequence of numbers or letters used to open a combination lock
（用以开启暗码锁的）数字或字母组合.
5.
A design combining or interweaving letters or initials;a monogram.
组合文字字母或开头字母合并或交织成的图案；拼合文字
6.
When do you double the final consonant?
在什么情况下双写词尾的辅音字母?
7.
A written character or combination of characters having two or more phonetic values, such as the English letter a.
多音字母；多音符号具有两种或更多音值的一个书面字母或几个字母的组合，如英语字母a
8.
String: Any combination of alphabetic or numeric codes in a computer program.
字符串:电脑程式里，字母或数字代码的任何组合。
9.
Note: Same letters， no significant difference; Different letters， significant difference.
注：两组之间字母相同，无显著差异;两组之间字母相异，差异显著。
10.
a word formed from the initial letters of a multi-word name.
由多个单词首个字母组成。
11.
In cryptanalysis, a triple of successive letters.
密码分析中的一组三个连续字母。
12.
Two letter combinations, the most common of which are: th, in, er, re and an.
两个字母的组合,最常用的有:th, in, er, re和an。
13.
The two characters form a single word, they cannot be separated.
这两个字母组成一个单词，不能拆开。
14.
Different Pronunciations of MC Finals Jia Kai San with Initial Jing Groups vs.Yi in Northern Shaanxi Province;
陕北晋语假开三精组和以母字的读音
15.
'N SYNC is made up of the last letter of each of the first names of the five young men:
这个名字由他们各自姓的最后一个字母组成。
16.
monogram one's handkerchief
在手帕上缀上(自己姓名起首字母组成的)交织字母
17.
An identity involving letters is true for any set of numerical values of the letters in it.
包含字母的恒等式对于式内字母的任何一组数值都是适合的。
18.
A written symbol or character representing a speech sound and being a component of an alphabet.
字母一种书写符号或代表一个语音的特征，是字母表的组成部分