Class variables must also be used with care, but they are precisely the right tool for introducing names for constants, as discussed in the following section.
类变量同样需要小心使用，但它们又恰恰是引入下一部分要讨论的常量命名的最好工具。
Class variables must also be used with care, but they are precisely the right tool for introducing names for constants, as discussed in the following section.
类变量同样需要小心使用，但它们又恰恰是引入下一部分要讨论的常量命名的最好工具。
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