linear contraction

例句：

1. 1. The path is linear and easy to follow.
   这条路线是直线的，很容易跟随。
2. 2. The data points are linearly related to the variable.
   数据点与变量呈线性关系。
3. 3. The company's growth has been linear over the past decade.
   该公司过去十年的增长是线性的。