coefficient of linear extensibility

例句：

1. 1.The path is linear and easy to follow.
   这条路径是直线的，很容易跟随。
2. 2. The data is linear and can be easily plotted on a graph.
   数据是线性的，可以很容易地在图表上绘制。
3. 3.The book has a linear layout of chapters.
   这本书有章节的线性布局。