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11. | radius of the universe |
| 宇宙半径 |
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12. | radius of inertia |
| 惯量半径;惯性半径 |
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13. | radius of visibility |
| 能见半径;能见度半径 |
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14. | equivalent radius |
| 当量半径 |
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15. | hydrodynamic radius |
| 水力半径|流体动力学半径 |
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16. | tail radius of crane |
| 后部旋转半径;起重机后部旋转半径 |
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17. | radius of torsion |
| 扭转半径;挠率半径 |
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18. | atomic radius |
| 原子半径 |
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19. | radius of action |
| 有效距离;作用半径;活动半径 |
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20. | fireball radius |
| 火球半径 |
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