That the phonebook was sorted alphabetically and that the array of numbers on the board behind the second row of paper itself was sorted alphabetically.

电话簿是按照字母顺序排列的,而且黑板上第二排后面的一系列数字,也是按字母顺排列的。

哈佛公开课 - 计算机科学课程节选

You have to come up with a convention that maps numbers to letters.

你必须提出一个,数字与字母对应的协定。

哈佛公开课 - 计算机科学课程节选

So, what's the idea? If I know what my hash function does, it maps, in this case characters into a range zero to 256, which is zero to 255, I create a list that long, and I simply mark things.

我知道我的哈希函数做什么,在这个例子中，它将字母，映射成0到255的256个数字，我创建了一个这么长的列表，并且我只是简单的标志这些东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

Diets by numbers and letters -eDiets, Number Seven, The GI Diet.

还有关于数字和字母的减肥法,E减肥法,数字七,GI减肥法

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

A If you want to convert a number like 65 to the letter A, you just have tell the computer "cast that int to a char."

如果你要把一个像65这样的数字转换为字母，你只需要告诉计算机“把那个int型数据转换成char型处理“

哈佛公开课 - 计算机科学课程节选

This might look a little cryptic at first, but it turns there is some very obvious patterns here, for instance. According to this chart, if you want to represent the letter A A in the so called ASCII system, what number do you actually use to do so?

起初，它看起来有点神秘，但你会发现它有一些明显的对应模式，这里就有例子，根据图表，在所谓的ASCII系统中,你想表示字母，你该用哪些数字呢？

哈佛公开课 - 计算机科学课程节选