He who studies books alone will know how things ought to be, and he who studies men will know how they are.
单独研究书本的人会知道事情应该怎样，研究人的人会知道事情应该怎样。
-- Charles Caleb Colton 英国作家科尔顿
He who studies books alone will know how things ought to be, and he who studies men will know how they are.
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