类名可以包含字母、数字和下划线字符的任何组合，但不能以数字打头。
The class name can contain any combination of letters and Numbers, as well as the underscore character, but cannot begin with a number.
但是，由于它可以包含字母数字字符，因此它不适于与Sphinx结合使用，Sphinx要求索引的每条记录都有一个惟一的32位整型键。
However, because it can contain alphanumeric characters, it's inappropriate for use with Sphinx, which requires each record indexed to have a unique 32-bit integer key.
属性名可以包含在元素名中使用的字符，规则也是类似的，即字符之间不能带有空格，名称只能以字母开始。
Attribute names can include the same characters as element names, with similar rules for omitting Spaces and starting names with alphabetic characters.
软件包本身的名称(不是文件名，仅仅是软件包的名称)可以包含小写字母、数字以及“-”和“+”字符。
The name of the package itself (not the filename, just the name of the package) can contain lowercase letters, Numbers, and the "-" and "+" characters.
因为名称只包含数字和字母，所以任何其它字符都可以表示这个循环的结束。
Because a name contains only digits and letters, any other character signals the end.
当预览表单以检查计算时，可以看到Subtotal和TotalPrice的输入字段包含字母NaN，这表示这个字段不是数字。
When you preview the form to check the calculations, you see that the input fields for Subtotal and Total Price contain the letters NaN, which stand for Not a Number.
pwgen可以生成一个或多个密码，可以指定不同的密码长度，可以指定必须包含大写字母或数字。
Pwgen can generate one or multiple passwords, and you can specify different password lengths, which can include using a capital or numeric digit.
可以把密码设定为更容易记忆的或更安全的，还可以指定密码是否包含数字、符号、元音和大写字母。
You can tailor the passwords to be memorable or secure, and you can specify whether to include Numbers, symbols, vowels, and capital letters.
有些遥控器上甚至包含很小的字母键盘，可以用来通过电视发送电子邮件，沙发上放着四五只遥控器也越来越常见。
Some remote controls even have tiny alphabetic keyboards to enable e-mails to be sent through the television, and it is not unusual to see four or five controllers sitting on a single sofa.
“形式完好”意味着不可以重叠(overlapping)元素，所有元素都必须包含关闭标签，而属性必须包含双引号和一个值，字母大小写也同样重要。
Well-formed means there can be no overlapping elements, all elements must contain a closing tag, attributes must be quoted and given a value, and the case of the characters is important.
这些规则指定密码可以包含哪些内容，例如，密码是否应当只包含字母或字母数字字符。
These rules specify what a password can consist of, such as whether a password should consist of only alphabets or alphanumeric characters. The following rules are supported.
最安全的口令至少应该包含8个字符，包括字母和数字，且不能包含字典中可以找到的单词。
The safest passwords are at least 8 characters long, include both letters, and number or symbols, and contain no words found in a dictionary.
最安全的口令至少应该包含8个字符，包括字母和数字，其中不能包含字典中可以找到的单词。
The safest passwords are at least 8 characters long, include both letters and Numbers, and contain no words from a dictionary.
按字母顺序给类别分类，并且只包含ID是16,3,9，和5的类别，你可以写下以下的代码。
To sort categories alphabetically and include only the categories with IDs of 16, 3, 9 and 5, you could write the following code.
你可以假设每一个单词只包含小写字母。
You may assume that each word will contain only lower case letters.
我可以实现自然排序一个VARCHAR字段包含各种长度的字母数字值吗？
Can I achieve Natural Sorting on a VARCHAR field which contains various length alphanumeric values?
有些遥控器上甚至包含很小的字母键盘，可以用来通过电视发送电子邮件，沙发上放着四五只遥控器也越来越常见。
Some remote controls even have tiny alphabetic keyboards to enable emails to be sent through the television, and it is not unusual to see four or five controllers sitting on a single sofa.
该名称可以是字母、数字或下划线的任意组合，但名称不能以数字开头且不能包含空格。
The name can be any combination of letters, Numbers, or an underscore that does not start with a number, and it cannot contain Spaces.
该名称可以是字母、数字或下划线的任意组合，但名称不能以数字开头且不能包含空格。
The name can be any combination of letters, Numbers, or an underscore that does not start with a number, and it cannot contain Spaces.
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