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1.The study of psychology is a field that has been extensively studied for decades.
心理学研究是一个被广泛研究的领域几十年了。
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2. The psychological variable of interest in this study is the impact of stress on memory.
本研究中感兴趣的心理变量是压力对记忆的影响。
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3. The researcher found that the psychological variable of interest had a significant effect on the participants' performance.
研究者发现，感兴趣的心理变量对参与者的表现有显著影响。