They're very fragile and delicate, " said Min Xu, a paper coauthor and research assistant professor at the Feinberg School.

它们很脆弱。” 许敏说，她是文章的合著者，也是费英堡学院的研究助理教授。

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"On a few labels they construed the meaning to be the exact opposite of what was meant, " says Michael Wolf, a researcher at the Feinberg School of Medicine at Northwestern University and coauthor of the soon-to-be- published study.

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