然而，对此他并没有认真地加以分析和论证。
However, he did not have to be careful analysis and argumentation.
本文对矿井通风的某些基本性质进行了分析和论证。
Some of the basic features of mine ventilation network are analyzed.
然后通过一系列的分析和论证，提出了解决问题的建议和方案。
After having a series of analyses and demonstration, advises and scheme to solve the problems are discovered.
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