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.
这些策略制定了密码的最小长度以及类的最少数量(比如字母、数字和特殊符号中的类的数量)。
These policies mandate the minimum length of password and minimum number of classes (as in alphabets, numerals, and special characters, etc).
第二类词是“同音词”，它的创造相结合的字母和符号或数字，听起来像其他的话。
The second kind of word is a " homophone -it's created by combining letters and symbols, or numbers, to sound like other words."
这个类用于一般字母数字的输入，可指定例外的字符。
This class is used for general alphanumeric input with the exception of whatever characters you specify to not be allowed.
这个类用于一般字母数字的输入，可指定例外的字符。
This class is used for general alphanumeric input with the exception of whatever characters you specify to not be allowed.
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