ObjectiveA qualitative method was introduced to measure the equality of health distribution.
目的介绍一种利用定性资料， 测量健康分布公平性的方法。
We introduce the concept of time-variable directional field, and establish the stable and unstable theorems by the qualitative method.
引入了时变方向场的概念，用定性方法建立了稳定及不稳的定理。
Secondly, the study used qualitative method to analyse some students of the measure study by open-ended questionnaire and research interview.
其次，研究者主要运用开放式问卷和研究性访谈对测量研究的部分初中生进行了质化分析。
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