Science of Chinese characters has both the function of theoretical guidance and the value of practical application.
“汉字学”是研究汉字的学科，对识字教学既有理论指导作用，也有实际应用价值。
This method has important academic meaning and value of practical application on fault diagnosis in to-and -fro dynamical machine.
这种方法的提出对内燃机等往复动力机械故障诊断具有重要的理论意义和现实应用价值。
Modification technology by composition can not only effectively optimize the performances of polyaniline but improve its value of practical application.
复合改性技术能够有力的优化聚苯胺的性能，进步聚苯胺材料实际应用的价值。
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