俗语说得真不错，狗所吐的他转过来又吃。猪洗净了又回到泥里去辊。这话在他们身上正合式。
旧约 - 出埃及记(Exodus)
But it is happened unto them according to the true proverb, The dog is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.
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