If A and B are two points on a line, the part of the line between and including A and B is a line segment. This may be denoted by AB or BA. The length of the line segment is the distance between A and B. Compare directed line segment.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。