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21. | An external force is one whose source is outside the system. |
| 外力是来源于系统之外的力。 |
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22. | unless it is slowed down by an outside force. |
| 除非它受到外力而慢下来。 |
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-- 来源 -- 综合英语第3册 - Unit 7 Famous Scientists Text A |
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23. | rate of head movement |
| 施加外力速度;压头移动速率 |
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24. | Fluid motion caused by an external force such as gravity. |
| 由重力等外力引起的流体运动. |
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25. | The damage was caused by external forces. |
| 损害是由外力引起的。 |
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26. | "Fracture: Break in a Bone, caused by stress." |
| 骨折:由外力引起的骨骼断折。 |
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27. | at the same speed unless they are acted on by force. |
| 如果无外力的作用的话。 |
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-- 来源 -- 综合英语第3册 - Unit 6 Popular Science Text B |
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28. | It's describing a fire that needs a spark to ignite itself. |
| 这是用来描述需要外力引发的 火灾 |
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29. | Economics, Culture, and the External Influence-------An Analysis of Causes of Localism in the |
| 经济·文化·外力——民国地方主义成因探析 |
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30. | opportunity for,or help in,starting |
| 开始的时机;起推动作用的外力 |
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