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The study used a "cross-over" design, which allowed each subject to serve as his or her own comparison group.
这个研究试验采用了交叉设计,这样每一个研究对象的对照组就是他(她)自己。
youdao
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The study used a "cross-over" design, which allowed each subject to serve as his or her own comparison group.
这个研究试验采用了交叉设计,这样每一个研究对象的对照组就是他(她)自己。
youdao