本文是实证性研究论文。
本文是关于HSK外部效度的一次实证性研究。
This paper is an experimental study on the external validity of HSK.
先进行“预备性研究”，以挑选“实证性研究”的发球示范者。
Do the "pilot study" first to select a ball server of the "practical research".
本文最后给出了实证研究的政策性建议。
Finally, the paper puts forward some policy Suggestions from the empirical research.
目前为止，关于创造性思维与联想之间关系的实证研究尚属少见。
So far, the relations between association and creative thinking were fairly rare.
目前为止，关于创造性思维与联想之间关系的实证研究尚属少见。
So far, the relations between association and creative thinking were fairly rare.
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