“directed line segment”的概念、定义、翻译、参考文献-科学参考

单词	directed line segment
释义	directed line segment Mathematics If A and B are two points on a straight line, the part of the line between and including A and B, together with a specified direction along the line, is a directed line segment. $\vec{A B}$ denotes the directed line segment from A to B. See also vector.
随便看	secondary voltage secondary wave secondary winding secondary X-rays second-best second breakdown second contact second convoluted tubule second-degree price discrimination second derivative second derivative test second difference Second Front second fundamental form second generation second-generation biofuel second-generation Web site second home second law of thermodynamics second-level domain Second Life second messenger second normal form second of arc second-order approximation

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