hand tool consisting of a flat rigid rectangular bar (metal or wood) that can be used to draw straight lines (or test their straightness)
双语例句
The child used a ruler to draw straight lines. 这孩子用一把直尺划直线。
We draw a straight line on the paper with the straightedge, according to the European several Reed plane geometry principle, we said that it is a straight line. 我们在纸上用直尺画一条直线,按照欧几里德平面几何原理,我们说它是一条直线。