资料来源 : pyDict

动力,要素

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Momentum \Mo*men"tum\, n.; pl. L. {Momenta}, F. {Momentums}. [L.
   See {Moment}.]
   1. (Mech.) The quantity of motion in a moving body, being
      always proportioned to the quantity of matter multiplied
      into the velocity; impetus.

   2. Essential element, or constituent element.

            I shall state the several momenta of the distinction
            in separate propositions.             --Sir W.
                                                  Hamilton.

资料来源 : WordNet®

momentum
     n 1: an impelling force or strength; "the car's momentum carried
          it off the road" [syn: {impulse}]
     2: the product of a body's mass and its velocity; "the momentum
        of the particles was deduced from meteoritic velocities"
     [also: {momenta} (pl)]