人们要么听别人说话或者看一些代表着信息的字母或者符号。

You either heard someone speaking or saw the letters and symbols that defined a message.

youdao

一本按字母顺序排列的职业手册，提供了有助于课程选择的信息。

An A to Z of careers gives helpful information about courses.

《柯林斯英汉双解大词典》

创建密码时要确保你使用的是混合的数字、字母或符号，并且避免使用个人信息、序列或重复这类容易被黑客破解的密码。

When creating a password, ensure you use a mixture of Numbers, letters or symbols and avoid using personal information, sequences or repetition, as these passwords are easier to hack.

youdao

But we know already from week zero that computers ultimately represent all information with numbers, and if they want to represent letters inside memory, well what do they do or what do they use?

但是自从上周我们已经知道,计算机最终是用数字来表示所有的,信息，如果它们要描绘,在内存中的字母，它们该怎么做，用什么方式呢？

哈佛公开课 - 计算机科学课程节选

Someone-- or someone had to implement, had to write a tool called printf that itself takes input between quotes and produces as output some characters on the screen.

需要有人去实现，这个printf函数,以双引号间的信息为输入,输出相应字母到屏幕上。

哈佛公开课 - 计算机科学课程节选