Forthosewhohavenoaccesstocleanwater,thephrase“athirstfo...
问题详情：Forthosewhohavenoaccesstocleanwater,thephrase“athirstforknowledge”maysoonhaveanewmeaning.Researchershavedevelopedabookwithspeciallytreated pages thatcanmakewatersafetodrink.Theresearcherss...