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- 問題詳情：Forthosewhohavenoaccesstocleanwater,thephrase“athirstforknowledge”maysoonhaveanewmeaning.Researchershavedevelopedabookwithspeciallytreated pages thatcanmakewatersafetodrink.Theresearcherssaytheirinventioncouldimprovethelivesofmanyinthedev...
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