用“unsolved problem”造句大全，unsolved problem造句
Thisisanunsolvedproblem.Inheritancetheoryofontologiesisaveryimportantunsolvedproblem.However,themostprofoundunsolvedprobleminbiologyistheoriginoflifeitself.Intheendtheunsolvedproblemandgoing-ondirecti...
用“unsolved”造句大全，unsolved造句
Ruralpovertyandchronicallydistressedregionscontinuetopresentpolicymakerswithunsolvedproblems."Thisisoneoftheunsolvedmysteriesoflong-distanceflights,"Klaassensaid.Hisresortburneddownin1994-anunsolved...