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You also need to add a few simple accessor methods to SimpleNode.
您还需要将一些简单的存取器方法添加到SimpleNode。
youdao
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The effective use of accessor methods will be covered in future tips.
以后的提示中会涉及访问器方法的有效使用。
youdao
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The effective use of accessor methods will be covered in future tips.
以后的提示中会涉及访问器方法的有效使用。
youdao