Whether I drop an object or throw it vertically up or I throw it vertically down, it's all one-dimensional.
当我把物体扔出去，无论是垂直向上扔，还是垂直向下扔，这都是一维运动。
I have a motion of an object along a straight line we'll call that one-dimensional motion.
假设有一物体，沿直线运动，我们把它称为一维运动。
Technique of three-dimensional object recognition is one of the most important techniques in video tracking system and also a difficult problem in it.
三维目标识别技术是电视跟踪系统中的关键技术之一，也是目前该领域亟待解决的一个难题。
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