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| 81. | If a republic be small, it is destroyed by a foreign force; if it be large, it is ruined by an internal imperfection. |
| 如果一个共和国版图狭小，则会亡于外力；如果疆域辽阔，则会亡于内部的邪恶势力。 |
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| 82. | The foreign invasion of modern China made Beijing and Shanghai in the different roads. |
| 近代以来的外力入侵使北京与上海分别走上了不同的发展道路。 |
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| 83. | For laying in doors、intunnels and in cable trench, able to berar external mechanical forces, but unale to bear large pulling force. |
| 室内、隧道、电缆沟等能承受机械外力的场所，但不能承受大的压力。 |
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| 84. | This effect is due to the high radial compression produced by the external forces acting at the supports. |
| 此种效应是由于作用在支点的外力所产生的高度径向压缩而引起的。 |
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| 85. | For laying indoors,in tunnel,cable trench,well or direct buried,able to bear external mechanical forces and detreminate pulling force. |
| 室内、隧道、电缆沟、竖井或埋地敷设等，能承受机械外力和一定的拉力。 |
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| 86. | For laying indoors, in tunnel, cable trench, well or direct in ground, able to bear external mechanical forces and certain pulling force. |
| 室内、隧道、电缆沟、竖井或埋地敷设等，能承受机械外力和一定的拉力。 |
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| 87. | When broken by impact of outside force, glass becomes honeycomb grains, avoiding harming human body, with good safety performance. |
| 遇外力冲击玻璃破碎后成蜂窝状颗粒，可避免对人体的伤害，安全性能好。 |
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| 88. | The two systems, connected by inextensible link members, are assumed to resist the full external horizontal forces at floor levels. |
| 这两种体系借无弹性的连杆联结，人们假设用它们抵抗各楼板的全部水平外力。 |
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| 89. | For laying indoors, in tunnel, cable french, well or direct in ground, able to bear external mechanical for ces and certain pulling force. |
| 室内、隧道、电缆沟、竖井或埋地敷设等，能承受机械外力和一定的拉力。 |
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| 90. | Any system capable of a free vibration without external force is a counter example, e.g. a wire in the piano. |
| 任何一个无外力而能自由振动的系统就是一个反例，譬如钢琴中的一条钢丝。 |
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