The researchers also should reduce the influence of irrelevant variables in measurement to guarantee the external validity of processing.
控制具体测量过程中的无关变量的影响，保证统计处理的外部效度。
The researchers also should reduce the influence of irrelevant variables in measurement to guarantee the external validity of processing.
控制具体测量过程中的无关变量的影响，保证统计处理的外部效度。
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