本帖最后由 eyuge2 于 2017-11-6 21:28 编辑
你应该是对的。位置和位置向量应该是一个意思。
https://en.wikipedia.org/wiki/Position_(vector)
In geometry, a position or position vector, also known as location vector or radius vector, is a Euclidean vector that represents the position of a point P in space in relation to an arbitrary reference origin O. Usually denoted x, r, or s, it corresponds to the straight-line distances along each axis from O to P:[1]
但是先有点，然后才有点的位置。或者某个位置有一个点。
点和位置是等价关系？
点的位置是向量，应该还不能直接说点是向量，
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