By means of the numerical solution to deal with the systematical equations, the important flow laws to actual engineering are obtained.
通过数值求解分层流的数学方程，得到了对工程实际应用有重要价值的流动规律。
A systematical study on the woody plant flora in the Daba Mountains was pursued in this paper by means of an investigation on plant taxa.
本文通过详细的植物类群调查，对大巴山木本植物区系进行了较为系统的研究。
We do systematical research on the theory and methods of enterprise valuation by means of using comparative research and empirical research.
论文的主要内容如下：本文首先对国内外关于企业价值评估模型的文献进行综述；
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