这不是大脑结构第一次被这样进行比较，但是之前的研究建立在对死者的研究上。
This is not the first time that brain structure has been compared in this way, but earlier studies had been based on post-mortem comparisons.
这是比较结构和放松(瑞典)按摩的第一个研究，试验发现这两种类型的按摩效果很好，副作用少。
The first study to compare structural and relaxation (Swedish) massage, the trial found that both types of massage worked well, with few side effects.
本文对现有围护结构传热系数的测试方法做了分析与比较，以热流计法作为研究对象。
This paper compared and analyzed existing detection methods, then took Heat Flow Meter method as research object.
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