Then, the author did some researches on relationships, dates and regions of different types of bronze drums, especially on some disputed questions.

在对铜鼓分类的基础上，就各类型铜鼓的源流关系、年代以及分布等做了相关探讨，尤其是就其中分歧较多的一些问题做了重点分析。

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One of the focus problems of mycorrhizal researches has been laid on the relationships between mycorrhizal fungi and microbe of rhizosphere and their influences on host plant.

菌根真菌与根际微生物间的关系及其对宿主植物的影响是近年来菌根研究的一个热点问题。

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Economic system is a non_stable, non_equilibrium and complex system, and then the (researches) on non_stable and non_equilibrium relationships of economic system are important in theory and practice.

经济系统是一个非稳定、非均衡的复杂系统，研究经济系统的非稳定、非均衡关系，具有重要的理论价值和实际意义。首先将经济系统简化为由资本品生产部门和消费品生产部门组成；

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