Fair use permits me, at my expense, to make copies of a scientific article and distribute it to a class so that we can have an educational discussion about it.

合理使用允许我在成本归已的情况下复制一篇科学文章发给课堂里的学生，依此针对它进行教学性的讨论。

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Still, withdrawals are tax-free if used for any educational expense, including tutoring, computer purchases or private primary or high school.

FORBES: Investment Guide: Taxes