linear light source

例句：

1. 1.The data is presented in a linear format.
   数据以线性格式呈现。
2. 2. The path is linear and easy to follow.
   这条路线是直线的，很容易跟随。
3. 3. The book is written in a linear narrative style.
   这本书是以线性叙事风格写的。