He wrote that because it is impossible to determine the value of every good through a count of the number of other goods it is worth, the necessity arises of a single universal standard of measurement.
hiː ɹˈoʊt ðæt bɪkˈʌz ɪɾ ɪz ɪmpˈɑːsᵻbəl tə dɪtˈɜːmɪn ðə vˈæljuː ʌv ˈɛvɹi ɡˈʊd θɹuː ɐ kˈaʊnt ʌvðə nˈʌmbɚɹ ʌv ˈʌðɚ ɡˈʊdz ɪɾ ɪz wˈɜːθ, ðə nəsˈɛsɪɾi ɚɹˈaɪzᵻz əvə sˈɪŋɡəl jˌuːnɪvˈɜːsəl stˈændɚd ʌv mˈɛʒɚmənt.