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| 1. | Radar is a system by means of which it is possible to detect the presence of objects and to determine |
| 雷达使这样一种系统，用它能探测物体的处所，并能断定其速度、方向和距离。 |
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| 2. | to determine the velocity |
| 测定速度 |
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| 3. | A space navigator wishes to determine his velocity of approach as he nears the moon. |
| 一个宇宙飞行员希望确定出他接近月球时的逼近速度。 |
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| 4. | The purpose of the current study was to determine whether changes in velocity-based community ambulation |
| 本研究目的在于揭示步行速度变化是否与中风患者功能和生活质量的变化相关。 |
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