Then, we introduce a model to make further understanding the problems of principal-agency of state-owned commercial banks.

接着给出了一个委托-代理模型及其扩展模型，使我们对委托-代理问题有了更加深刻的理解；

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Based on the present state of weathering agency research at home and abroad, principal problems are pointed out in quantitative assessment of rock mass weathering.

在分析国内外岩体风化问题研究现状的基础上，指出了目前岩体风化量化评价存在的主要问题。

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