Straightedge

['streɪtedʒ] or ['stret,ɛdʒ]

解釋/意思:

(noun.) hand tool consisting of a flat rigid rectangular bar (metal or wood) that can be used to draw straight lines (or test their straightness).

艾伯纳錄入--From WordNet

解釋/意思:

(n.) A board, or piece of wood or metal, having one edge perfectly straight, -- used to ascertain whether a line is straight or a surface even, and for drawing straight lines.

整理:尼古拉斯