为什么会出现这种现象？美国人是如何应对这种问题的？
Why is this, and how are Americans dealing with the problem?
利物浦大学的进化心理学家说，这个研究很有趣，但生物学家们还没有完全知道为什么会出现这种现象。
The university of Liverpool evolutionary psychologists said, the research is very interesting, but biologists is still not fully know why will appear this kind of phenomenon.
为什么这种迷信现象会出现在大学校园里面？
Why would this phenomenon of superstition exist in college's campuses?
为什么这种迷信现象会出现在大学校园里面？
Why would this phenomenon of superstition exist in college's campuses?
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