7 is a number that is assigned least cultural/visual significance
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送交者: meiyou 于 2007-09-21, 10:11:54:
回答: 还比较准。除了第一个不好解释外，其他的比较容易理解 - 由 meiyou 于 2007-09-21, 10:08:07:
in that range, so its arithmetic meaning kind of stand out.
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