A well-designed experiment calls for a range of treatments, explicit control groups, and careful post-treatment analysis.
一个设计完美的试验需要一系列的处理，明晰的控制分配和处理后仔细的分析。
A well-designed experiment calls for a range of treatments, explicit control groups, and careful post-treatment analysis.
一个设计完美的试验需要一系列的处理，明晰的控制分配和处理后仔细的分析。
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