名詞 straight line:

1. a line traced by a point traveling in a constant direction; a line of zero curvature

1. The curve traced by a point on the circumference of a circle that rolls on a straight line.
   圓滾線，擺線圓周上任一點在一條直線上滾動時所形成的曲線
2. A geometric element that generates a geometric figure, especially a straight line that generates a surface by moving in a specified fashion.
   母點，母線形成一個幾何圖形的幾何要素，尤指通過以規(guī)定方式運動而產(chǎn)生一個面的一條直線
3. A surface containing all the straight lines that connect any two points on it.
   平面包含面上所有連接任意兩點的直線的平面
4. In, of, describing, described by, or related to a straight line.
   直線的直線本身的、直線的、描述直線的或用直線描述的或與直線有關的