Both quantitative and qualitative instruments are employed to gather data, including questionnaire, interviews and classroom observation.
作者采用了定量和定性研究工具，如问卷，访谈，和课堂观察。
Both quantitative and qualitative instruments are employed to gather data, including questionnaire, interviews and classroom observation.
作者采用了定量和定性研究工具，如问卷，访谈，和课堂观察。
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