研究人员目前正在一群选定的牛身上验证这一想法。
Researchers are currently testing their idea on a select herd of cattle.
为验证这一想法，研究者采取了下列方法：将84个中国大学生分为两组。
To test the idea, the researchers took the following approach: 84 students at a Chinese university were divided into two groups.
为了进一步验证这一想法，研究小组给志愿者们促进多巴胺释放的药物，然后再次扫描他们的大脑。
To test the idea still further, the team gave volunteers a drug that releases dopamine, then scanned their brains again.
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