You should travel at a safe speed relative to the motion of the other vehicles on the road.
你应该使用一个对于道路上其他车辆相对安全的速度行驶。
A novel compressed-domain video watermarking algorithm based on motion speed was presented, the performance analysis of relative detection was given.
在运动矢量的基础上提出运动速度概念，并提出一种基于运动速度的压缩域视频流水印算法，给出相关检测性能分析。
The size of the arrows indicates the relative speed of plate motion.
箭头的大小代表了相应的板块移动速度。
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