为了免却从安卓的字母键盘切换到数字与符号键盘的麻烦，按下点号键便可看见常用的标点与其他符号。

Android's letter keyboard to its number and symbol keyboard, hold down the period key to see commonly used punctuation marks and symbols.

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大多数人拥有字母数字式密码，或者有安全意识的人，拥有附带其他键盘符号的字母数字式密码。

Most people have passwords that are alphanumeric or, in the case of a security-conscious individual, alphanumeric with the addition of other keyboard symbols.

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使用标准ASCII键盘上所有的符号那你将有95种选择。

Use all the symbols on a standard ASCII keyboard and you have 95 to choose from.

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So, here is the symbol for C and the staff here is where C would be located on the keyboard.

这是C的符号,这里是C在键盘上的位置

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Now, once you know each of those, you can now do 25 more upper case letters and 25 more lower case letters then there are some other stuff like punctuation and things you see on the keyboard.

一旦你知道两者中的任何一个，你就知道了另外25个,大写字母和小写字母,标点和在键盘上的,各种符号也有ASCII码。

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Well, it's a prefix most of the symbols in this function with just an asterisk, with a * from the keyboard so Shift-8.

好的，在这个函数中它是一个前缀符号,就是一个星号，在键盘中用Shift-8输入。

哈佛公开课 - 计算机科学课程节选