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一只喜鹊落在了阳台上,妈妈对女儿说: 这是吉祥鸟,是客;
一只燕子落在了阳台上,妈妈又对女儿说: 这是益鸟,是客;
一只乌鸦飞来,落在了阳台上, 小女孩问乌鸦: 你也是客吗? 乌鸦回答: yes, I am 黑客!
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