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来源:雅诚德英语网
The two groups are chosen at random, so the remedy should be the only systematic difference between them.
这两个组是随机抽取的,所以他们在系统中的唯一区别就在是否接受治疗。
The two groups are chosen at random, so the remedy should be the only systematic difference between them.
这两个组是随机抽取的,所以他们在系统中的唯一区别就在是否接受治疗。