METHODS the gradient experiments of single factor and multilevel orthogonal design were integrated and the results of the two experiments were analyzed.
方法采用单因素多水平的梯度实验和正交设计实验相结合，对两种不同实验方法所得结果进行分析。
METHODS the gradient experiments of single factor and multilevel orthogonal design were integrated and the results of the two experiments were analyzed.
方法采用单因素多水平的梯度实验和正交设计实验相结合，对两种不同实验方法所得结果进行分析。
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