The study and application of coagulant to water treatment is introduced in this paper.

本文介绍了水处理用混凝剂的研究及应用状况。

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This technique is significant to promote the study and application of chaos communication system.

该技术的提出对进一步推动混沌通信系统的研究和应用有重要意义。

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The established equation provides a theoretical foundation for the study and application of CO_2 arc welding.

文中所建的表达式，为CO_2电弧焊的研究和应用提供了理论依据。

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Advance the study of ecological sustainability and promote the open exchange and wide application of the knowledge acquired.

CNN: Earth Charter sets course for sustainable living