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| 41. | doctrine of zero growth |
| 原点增长学说 |
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| 42. | BP (base point) |
| 基点,原点 |
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| 43. | original points of vision field |
| 视野原点 |
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| 44. | Drag onto the page, then drag one line end to ordinate origin and one to the feature. |
| 拖到绘图页上，然后将一个线端拖到坐标原点，一个线端拖到部件。 |
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| 45. | Zero potential energy would mean that the particle was always located at the origin, so that ?? |
| 零势能意味着粒子总是局限在原点上，所以??为零。 |
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| 46. | A central force is a radial force which depends only on the distance from the origin. |
| 有心力是一种径向力，它的大小只取于离原点的距离。 |
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| 47. | To get a description of direction along the line, we shall call the line on one side of the origin positive |
| 为了描述这条直线的方向，我们把位于原点一侧的直线叫作正的，而把位于原点另一侧的直线叫做负的。 |
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| 48. | Finally, since there is no absolute origin in time, all systems must be invariant under time displacements |
| 最后，因为没有绝对的时间原点，所以任何系统在时间平移下一定不变。 |
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| 49. | it turns out that some of the relativistic wave functions for the hydrogen atom are infinite at the origin |
| 事实上，实际情况是氢原子的某些相对论波函数在原点是无限的。 |
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| 50. | From Jan. 1989 to Dec. 1993, 198 Patients hospitalized for fever of unknown origin (FUO) were studied |
| 对198例原因不明发热(Fever of Unknown Origin FUO)患者行病原学、血清学、组织学等方法检查确定其诊断。 |
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