Informally, the result says that there is no efficient way for two parties to trade a good when they each have secret and probabilistically varying valuations for it, without the risk of forcing one party to trade at a loss.
ɪnfˈɔːɹməli, ðə ɹɪzˈʌlt sˈɛz ðæt ðɛɹ ɪz nˈoʊ ɪfˈɪʃənt wˈeɪ fɔːɹ tˈuː pˈɑːɹɾiz tə tɹˈeɪd ɐ ɡˈʊd wɛn ðeɪ ˈiːtʃ hæv sˈiːkɹᵻt ænd pɹˌɑːbəbɪlˈɪstɪkli vˈɛɹiɪŋ vˌæljuːˈeɪʃənz fɔːɹ ɪt, wɪðˌaʊt ðə ɹˈɪsk ʌv fˈoːɹsɪŋ wˈʌn pˈɑːɹɾi tə tɹˈeɪd æɾə lˈɔs.