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在常用的二维(或三维)直角座标系中,分别有二个(或三个)互相垂直的座标轴。原点为各座标轴的交点,并且将各座标轴分为二段,在原点一侧的座标为正值,另一侧则为负值。
在二维直角座标系中,原点的座标为(0,0)。而在三维直角座标系中,原点的座标为(0,0,0)。
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