'B' is the second letter of the alphabet.
b是字母表的第二个字母。
I was playing a game the other day, in which you have to come up with fruit that starts with every letter of the alphabet.
有一天，我正在打游戏，玩法是以字母表中的每一个字母依次开始，然后你必须想出某种水果。
A substitution cypher is a simple encryption technique where every letter of the alphabet is substituted with another letter from the alphabet.
置换密码是一种简单的加密技术，采用这项技术将把字母表中的每个字母替换为字母表中的其他字母。
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