Suppress a warning from this rule only if backward compatibility issues require it.

只有在需要保持向后兼容性时，才禁止显示与该规则有关的警告。

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The system is a rule-based production system. Inference engine is the core part of expert system. We use forward chaining and backward chaining at the same time.

描述一种诊断型专家系统，它统属于基于规则的产生式系统，推理机是核心部分，分别采用了正向、反向推理技术。

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Now, you must work backward to solve the loss of that rule-of-thumb: To earn at those same rate today, you will need more stocks and possibly a venture into lower-grade credit.

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