但是泰德·莱格，英国艾克斯特大学的一个教育专家，提醒说，这种试验可能产生误导的结果。

But Ted Wragg, an expert in education at the UK's University of Exeter, warns that such trials can produce misleading results.

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艾克·塞特大学的历史学教授尼古拉斯奥尔姆花费数十年精力来研究这些小生灵。

Nicholas Orme, a professor of history at Exeter University, has spent decades in the company of these little spirits.

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艾克·塞特大学的历史学教授尼古拉斯奥尔姆花费数十年精力来研究这些小生灵。

Nicholas Orme, a professor of history at Exeter University, has spent decades in the company of these little spirits.

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