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- 问题详情：Onceuponatime，ahippo（河马）livedinarivernexttoabigtree．Oneday，abirdcameandnested（筑巢）inthetree．Thesongsofthebirdfilledthehippowithsomuchenvy（羡慕）thathecouldn’tthinkofanythingelse．Everydayhewouldthinkwhyhewasn’tborntobeabirdeventhoughthebirdtoldhimman...
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中文谷