Q comes between P and R in the English alphabet.

英语字母表中，Q在P和R之间。

《牛津词典》

Let's learn the English alphabet!

让我们来学习英文字母！

youdao

It is the first letter of the English alphabet.

它是英语字母表中的第一个字母。

youdao

Professor Morford says signers are like English learners whose first language uses a different alphabet.

VOA: special.2011.04.13

You can brute force it and unfortunately, the so-called Caesar cipher is not very secure because if you assume, for our purposes in English alphabet with 26 characters, say all lowercase for all uppercase, my God, you only have to try like 24, 25, 26 possible rotations until you can figure out what his secret message is.

你可以强行解密但是不幸地是，所谓的凯撒密码不是很安全的,因为如果假设，对于我们的26个字符的字母表,指明所有的小写为大写，我的天，你只要试24，25次，26次就可以解答出,密文的内容。

哈佛公开课 - 计算机科学课程节选

Though the Internet boasts users from dozens of countries, the alphabet is dominant, as is the English language -- a legacy of the Net's North American origins.

CNN: COMMUNICATION