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Methods and variables that are only accessed internally by your class, such as utility and helper functions that your public methods use for code abstraction, should be prefixed with an underscore.
翻译的是“如果方法和变量只在类内部使用,则应该在类名前加底线作为前缀”
但是,中间的一句怎么翻译?求完整的翻译。
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