A professor must have a theory as a dog must have fleas.
教授必须有理论，就像狗必须长跳蚤一样。
-- H. L. Mencken 门肯
A professor must have a theory as a dog must have fleas.
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A professor must have a theory as a dog must have fleas.
教授必须有理论，就像狗必须长跳蚤一样。
-- H. L. Mencken 门肯
