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ChristianEijkman,aDutchdoctor,lefttheNetherlandsfort...
問題詳情: ChristianEijkman,aDutchdoctor,lefttheNetherlandsfortheislandofJava.Manypeopleontheislandhadadiseasecalledberi-beri.Hewasgoingtheretotryandfindacure. Atfirst,Eijkmanthoughtsomekindof...