Some key techniques were classified and evaluated, and their advantages and disadvantages were analyzed. Based on the analysis and comparison, the improved methods and Suggestions were presented.
对一些关键技术进行了分类和评价，剖析其优势及不足，通过对各种方法的分析和比较，提出了一些改进的方法和建议。
And attribute idioms can be classified semantically into comparison class and relation class.
属性类成语又可分为比较类和关系类。
Trials eligible for inclusion are classified according to the reader's degree of certainty that random allocation was used to form the comparison groups in the trial.
对于使用随机分配设立对照组的入选试验，其具体分类取决于读者对试验报告的把握。
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