佛吉尼亚jkm技术公司，佛吉尼亚大学和科罗拉多州的研究人员进行了这项调查。
Researchers from the JKM Technologies company in Virginia, the University of Virginia and the University of Colorado did the study.
佛吉尼亚jkm技术公司，佛吉尼亚大学和科罗拉多州的研究人员进行了这项调查。
Researchers from the JKM Technologies company in Virginia, the University of Virginia and the University of Colorado did the study.
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