n.[物]动量；势头；动力；要素，契机 变形： 复数：momentumsmomenta 双语释义：n.(名词)[U]动力,冲力,势头 force that increases the rate of development of a process; impetus[U]运动量 quantity of motion of a moving object, measured as its mass multiplied by its velocity英英释义： momentum[ məu'mentəm ]n