Method:The method was orthogonal experiment design.
方法：采用正交试验法。
The Orthogonal Design is adopted to arrange experiment.
主要采用正交设计安排试验。
Arrange for experiment to animals in each group by orthogonal design.
各组动物根据正交设计安排实验。
Arrange for experiment to animals in each group by orthogonal design.
各组动物根据正交设计安排实验。
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