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单词 radius vector
释义
radius vector
n.
1. Mathematics
a. A line segment that joins the origin and a variable point in a system of polar or spherical coordinates.
b. The length of such a line segment.
2. Astronomy A straight line connecting the center of mass of a satellite, such as a planet, moon, or comet, to the center of mass of the body it orbits, such as the sun or Earth. Also called position vector.
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更新时间:2025/3/22 9:47:41