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- 問題詳情：Lostwalletswhichcontainapictureofababyaremorelikelytobereturnedtotheirowners,scientistshavediscovered. Researchersleft240walletsonthestreetsofEdinburghlastyeartoseehowmanywerereturnedtotheirowners.Someofthewalletscontainedoneoffourphotog...
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