per unit length

例句：

1. 1. The engineer calculatedthe distance between two points using a rulerand a protractor.
   工程师使用直尺和圆规计算两点之间的距离。
2. 2. Thecompany's new product line is designedto meet the needs of consumers at differentprice points.
   公司的新产品线旨在满足不同价格点消费者的需求。
3. 3. The construction project wascompleted in one year, which is perunit length compared to other projects.
   该项目在一年之内完成，与其他项目相比，这是按单位长度计算的。