Oopus Blog
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回到古希腊，如果你花许多许多时间、许多许多的精力研究牛头角的角度问题，也许会成为一位学术史上重要的学者。而如果你从牛头角开始关注切线，你可能会成长为一位伟大的数学家。那么，该如何避免自己成为牛头角角度学家呢
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