原动力
yuán​dòng​lì

motive force

yuán​dòng​lì motive force
  1. 原 yuán noun
    origin
    (bound form) origin; source; beginning
  2. 动力 動力 dòng​lì noun
    motive power
    The physical force used to drive machinery or make objects move, such as electricity, wind, or water power

yuán​dòng​lì driving force
  1. 原 yuán noun
    origin
    (bound form) origin; source; beginning
  2. 动力 動力 dòng​lì noun
    driving force
    The motivation or impetus that pushes a person or a project forward; dynamic force