momentumKK [moˋmɛntəm] /moʊˈmɛntəm/發音名詞1氣勢、聲勢、動能The campaign gained momentum after the first televised debate.這場競選在第一場電視辯論後聲勢大增。2衝力、衝勢The truck kept rolling downhill on its own momentum.卡車靠著本身的衝力繼續往山下滑行。3動量物理In a closed system, total momentum is always conserved.在封閉系統中,總動量永遠守恆。