From the view of pragmatics, the humor has its laws, and it also has an interior relation with the pragmatic principles.

从语用学角度看，幽默的产生有一定的规律，语用原则与英语幽默的产生有着内在的联系。

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So it has much practical meaning to study the complexity of port industrial clusters in-depth, sequentially to harmonize the interior relation effectually among enterprises.

因此，深入研究港口产业集群的复杂性，从而有效地协调港口产业集群内部企业之间的关系，是一个十分具有现实意义的问题。

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But, present researches cast little light on interior relation of primary, secondary and tertiary industries and relation of industrial structure and space structure, employment structure.

但目前的研究在一二三产业内部结构和产业结构与空间结构、就业结构的相互关系方面仍较为薄弱。

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