kˌɑːnsɚvˈeɪʃən lˈɔːz fɚɹə jˈuːnɪt mˈæs hæv ɐ læɡɹˈæŋɡiən fˈɔːɹm, wˌɪtʃ təɡˌɛðɚ wɪð mˈæs kˌɑːnsɚvˈeɪʃən pɹədˈuːs juːlˈɪɹiən kˌɑːnsɚvˈeɪʃən; ɔnðə kˈɑːntɹɛɹi, wˌɛn flˈuːɪd pˈɑːɹɾɪkəlz kæn ɛkstʃˈeɪndʒ ɐ kwˈɔntᵻɾi lˈaɪk ˈɛnɚdʒi ɔːɹ moʊmˈɛntəm, ˈoʊnli juːlˈɪɹiən kˌɑːnsɚvˈeɪʃən lˈɔːz ɛɡzˈɪst.
Conservation laws for a unit mass have a Lagrangian form, which together with mass conservation produce Eulerian conservation; on the contrary, when fluid particles can exchange a quantity (like energy or momentum), only Eulerian conservation laws exist.