So, in a way, you can think of these as a space analog of polar coordinates because you just use distance to the origin, and then you have to use angles to determine in which direction you're going.
也可以把这种坐标，看成是空间中的极坐标，它其实使用了，距离原点的距离，然后用角度这种标尺，来确定了方向。
Often, scientists see large chunks drifting in polar seas, and then have to work backwards to figure out the point of origin.
通常来说，科学家们都是先观测到极地洋面漂浮着大面积冰块，之后再追溯它原始的形成过程。
We could do it dy dx. Or, maybe we will want to actually make a change of variables to first shift this to the origin, x-2 you know, change x to x minus two and then switch to polar coordinates.
也可以dy，dx来划分，或者,对变量做一下变化，移动到原点，就是把x变成,然后再转化成极坐标。
Then, the origin and the effect on imaging of time domain polar format algorithm residual video phase error are analyzed.
然后分析了时域极坐标算法存在残余视频相位误差的原因及其对成像结果的影响。
Then, the origin and the effect on imaging of time domain polar format algorithm residual video phase error are analyzed.
然后分析了时域极坐标算法存在残余视频相位误差的原因及其对成像结果的影响。
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