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| 61. | When a body is at rest, or in motion with constant velocity, the external force acting upon it are in |
| 当物体处于静止或作匀速运动时，作用在其上的外力是平衡的。 |
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| 62. | is returned; though having been broken at seam, they appear to have been torn open by some unusual force |
| 手套接缝处开裂，似乎因很大的外力撕扯所致，只好退还。 |
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| 63. | For laying indoors,in trenchesin ducts and in ground,able tobear heavier pulling force,andfor fixed installation |
| 敷设在室内、电缆沟、管道、直埋等能承受较大机械外力等固定场合。 |
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| 64. | ,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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| 65. | The abvance of the high strength glass is that can prevent damage from the hard stuff collision or outside |
| 高强度玻璃通过加热处理产生强化效果，能防止玻璃因硬物或外力碰撞而造成的损坏。万一玻璃破损也会形成碎粒状，确保安全。 |
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| 66. | The alternation of motion is ever proportional to the motive force impressed; and is made in the direction |
| 物体的加速度与所受的合外力成正比，与物体的质量成反比。加速度的方向与合力的方向相同。 |
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| 67. | The acceleration of an object is directly proportional to the net force acting on it and inversely proportional |
| 物体的加速度与所受的合外力成正比，与物体的质量成反比。 |
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| 68. | 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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| 69. | in doors, in tunnels and in cable trench, able to bare external mechanical forces and certain puling force |
| 室内、道、缆沟、井等能承受机械外力和一定拉力的场所。 |
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| 70. | rate of head movement |
| 施加外力速度;压头移动速率 |
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