As self-production rule and self-reference rule, the core of Luhmann's social systems theory, reflect a clear manifestation in contract system.

而作为卢曼社会系统理论核心的自我生产与自我参照概念，在合同制度中有着明显的体现。

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The executable rules are listed below the rule definitions they reference. They contain the information about their output definition and bindings.

可执行规则在它们引用的规则定义之下列出，包含关于输出定义和绑定的信息。

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Figure 8 shows that the left outer join operations are cascaded if a rule USES more than one reference column.

图8展示了如果规则使用了多个参考列，那么左外部连接就进行级联。

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Another amendment requires the government to "rule the country by law, " the first-ever such reference in the Constitution.

CNN: AN IDEOLOGICAL MILESTONE