"Success" in the classroom requires a student to master this abstract code.

课堂上的“成功”需要学生掌握这个抽象的代码。

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In this case, you can modify just the abstract class and the code will compile.

在这种情况下，您仅需修改抽象类，代码将完成编译。

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They keep a better control of code and abstract away the underlying technologies.

它们对代码有比较好的控制并抽象开底层技术。

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Building design models that abstract your implementation model and source code.

构建抽象你的实施模型和源代码的设计模型。

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Abstract classes are those with at least one method without code.

抽象类是那些至少有一个方法没有代码。

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Abstract classes are those with at least one method without code.

抽象类是那些至少有一个方法没有代码。

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