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| 31. | We have found that there is also a rotational analog for the momentum. |
| 我们发现对动量也有一个转动的对应量。 |
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| 32. | The law of conservation of angular momentum may be demonstrated with a gyroscope. |
| 角动量守恒定律，可以用回转器来演示。 |
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| 33. | The movement was gaining momentum. |
| 这运动势头越来越大。 |
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| 34. | 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。 |
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| 35. | 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？ |
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| 36. | Both the momentum and kinetic energy of the first are completely transferred to the second. |
| 第一个物体把它的动量和动能全部传递给第二个物体。 |
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| 37. | A falling object gains momentum as it falls. |
| 物体下落增进动量。 |
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| 38. | As a whole, the beam will therefore impart no total angular momentum to a target. |
| 因此，整个说来，这种光束将不传给靶任何总的角动量。 |
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| 39. | The movement to change the union's constitution is slowly gathering momentum. |
| 修改工会宪章的运动正慢慢加强. |
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| 40. | A similar consideration can be used to define the density of momentum, the density of energy, and so on. |
| 可以用类似的方法定义动量密度，能量密度等等。 |
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