What this article introduces is that the application of the method of summing up scientifically in the logic method during chemical teaching.

本文介绍的是逻辑方法中的科学归纳法在化学教学中的运用。

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This article introduces the cause and analyses the accident of the rotor holding in death of the boiler feedwater pump summing-up the way and technique measure in the process of repairing.

摘要介绍了大型氨厂锅炉给水泵转子抱死事故的原因，对其进行分析，并对修复过程中采取的方法及技术措施进行了总结。

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Finally, this paper and the work done by summing up the conclusions, points out that the direction of future research and the shortcomings of this article.

最后对本文所做的工作与结论进行总结，指出以后研究的方向和本文的不足。

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