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单词 frame of reference
释义 frame of reference
A set of axes, taken as being for practical purposes at rest, that enables the position of a point (or body) in space to be defined at any instant of time. In a four-dimensional continuum (see space-time) a frame of reference consists of a set of four coordinate axes, three spatial and one of time
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更新时间:2025/6/23 2:24:19