Therefore the study of stock prediction method has great application value and theoretical significance.
因此，股市预测方法的研究具有极其重要的应用价值和理论意义。
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。
Theoretical and application study on unclassified tailing filling have been systematically carried out in U. S. , South Africa, Canada, Germany and China.
因此，美国、南非、加拿大、德国和中国等对全尾砂充填技术进行了较系统的理论和应用研究。
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