n.画直线用尺
Each step of the construction of a circle with straightedge and compass calls for finding a point of intersection. 用圆规、直尺作圆的每一步都需要找一个交点。
Trisecting an arbitrary angle with a compass and straightedge was one of the famous ancient Greeks unsolved construction problems. 用直尺和圆规三等分一个任意的角是古希腊著名的构造问题之一。
In this paper, an experiment of test scale of straightedge is introduced by theprinciple of the Moire fringe shift amplifier. 本文介绍利用莫阿条纹位移放大器原理检验直尺刻度实验.
A straightedge provides a standard of straightness by comparison with which the straightness and flatness of a surface can be inspected . 直边提供了直线的检验标准，即表面的平面度可以与直边相比较做检测。
Mathematics To draw (a geometric figure) that meets specific requirements, usually with instruments limited to a straightedge and compass. 作图：根据具体要求画出（几何图形），通常只用直尺和圆规工具
