This discovery and research are of great theoretical significance and practical value for the study of mineralogy and the geology of mineral deposits.
这一发现和研究对于矿物学和矿床学均具有重要的理论意义和应用价值。
2
This discovery has great theoretical significance and practical value not only in mineralogy but also in geochemistry and geology of mineral deposits.
这一发现无论在矿物学，还是在地球化学和矿床学上都具有重要的理论意义和实用价值。
3
This study is of significance both in the theoretical research on the kaolinite mineralogy and in the developmental practice of kaolinites in coal measures of west Beijing.