继承是一个耦合机制：它使用关于可见性、方法调度等定义明确的规则绑定两个实体。
Inheritance is a coupling mechanism: it binds two entities together with well-defined rules about visibility, method dispatch, and so on.
对于这些实体，基于规则的提取是更合适的方法。
For these entities, rule-based extraction is the proper approach.
文章介绍了一个中文命名实体识别系统，该系统采用了统计与规则相结合的方法。
This paper presents a Chinese named entity recognition system that combines the statistics-based and rules-based method.
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