momentum

• The historical tide is surging forward with great momentum .
  历史洪流气势磅礴，奔腾向前。
• This is the well-known principle of conservation of momentum .
  这就是众所周知的动量守恒定律。
• Momentum may be thought of as a quantitative expression of inertia .
  动量可以被理解为惯性的定量表示。
• The law of momentum conservation could supplant newton's third law .
  动量守恒定律可以取代牛顿第三定律。
• A swarm of planets absorbed most of the available angular momentum .
  一大群行星吸收了大部分有效角动量。
• In undisturbed inertial motion, the angular momentum is constant .
  在无扰动惯性运动中，角动量是恒定的。
• Angular momentum conservation is based on the isotropy of space .
  角动量守恒是以空间的各向同性为基础的。
• We have found it necessary to represent momentum as an operator .
  我们已经发现需要用一个算符来表示动量。
• We exploit the energy and momentum conservation laws in this way .
  我们就是这样利用能量和动量守恒定律的。
• What states have a definite momentum in the x-direction, say ?
  譬如说，什么样的态在X方向具有确定的动量值？