Logic class structure is highly important to object-oriented design.

合理的类结构对面向对象设计阶段起着非常重要的作用。

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Summary: If you have not already done so, delegate some or all of your advice logic to another class that you can test directly.

概述：如果还没有做的话，可以将一些或者全部建议逻辑委派给其他可以直接测试的类。

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Instead, it keeps your previous skeleton class and its business logic.

相反，它会保持您以前的框架类和它的业务逻辑性。

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The class was Logic, in Cellblock 2, thirteen of us seated along both sides of a long table, with Ilgauskas at the head, a stocky man, late forties, beset this day by periodic coughing.

NEWYORKER: Midnight in Dostoevsky

Although Air Force One's operating costs per person far exceed the cost of even a first-class commercial ticket, the logic is that it's unfair to charge the president's campaign for the full cost of operating Air Force One because he has no choice but to fly on the presidential plane for security reasons.

CNN: The perks of presidential travel