名词
中文翻译：单位向量
同义词：
['vector', 'direction vector', 'unit direction vector']
例句：
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1. The unit vector of the angle between two vectors is used to determine their relative orientation.
两个向量之间的单位向量用于确定它们之间的相对方向。
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2. In physics, a unit vector is a vector whose magnitude is one and whose direction is perpendicular to the direction of the vector it points in.
在物理学中，单位向量是一个模长为一且与它所指向的向量方向垂直的向量。
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3. In computer graphics, a unit vector is a vector that has a magnitude of one and is perpendicular to the direction of the vector it points in.
在计算机图形学中，单位向量是一个模长为一且与它所指向的向量方向垂直的向量。