Without constant refreshes, DRAM will lose the data written to it as the capacitors leak their charge within a fraction of a second (not more than 64 milliseconds according to JEDEC standards).
wɪðˌaʊt kˈɑːnstənt ɹᵻfɹˈɛʃᵻz, dɹˈæm wɪl lˈuːz ðə dˈeɪɾɚ ɹˈɪʔn̩ tʊ ɪɾ æz ðə kəpˈæsɪɾɚz lˈiːk ðɛɹ tʃˈɑːɹdʒ wɪðˌɪn ɐ fɹˈækʃən əvə sˈɛkənd nˌɑːt mˈoːɹ ðɐn sˈɪksti fˈoːɹ mˈɪlɪsˌɛkəndz ɐkˈoːɹdɪŋ tə dʒˈɛdɛk stˈændɚdz.