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| 11. | Don' t leave the lights on it wastes electricity. |
| 走时要随手关灯--以免浪费电. |
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| 12. | What kind of cable do you want to send, ordinary rate or urgent? |
| 您要发哪一种电报，普通电还是加急电？ |
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| 13. | Electric currents persisted only for a moment. |
| 电的流动只持续短暂时间。 |
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| 14. | We derive the important law: opposite charges attract, like charges repel. |
| 我们得到的重要定律是：异电相吸，同电相斥。 |
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| 15. | Any kind of energy can be transformed into electricity. |
| 任何种类的能量都可变为电。 |
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| 16. | Both of the new treatments use electrical stimulation to correct the curvature. |
| 两种新的疗法都是利用电刺激来矫正脊柱。 |
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| 17. | A change in membrane potential affects the orientation of charged molecules. |
| 模电位变化影响着荷电分子的方向。 |
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| 18. | An iron is connected to an electric source that has a potential of 110v. |
| 电熨斗联接着电压为110伏的电源。 |
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| 19. | An electrified wire can be strung along the outer edges of this flange. |
| 在外缘引上一条通了电的电线。 |
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| 20. | Generators use magnetism in producing a flow of electricity (or electrons). |
| 发电机利用磁性产生电（或电子）流。 |
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