coefficient of land used for buildings

例句：

1. 1.The coefficient of friction between the two materials is 0.3.
   两种材料的摩擦系数是0.3。
2. 2.The cost of production increases by a certain coefficient with each increase in the input.
   生产成本随着输入量的增加而以一定系数增加。
3. 3. The coefficient of thermal conductivity is a measure of how quickly heat can pass through a material.
   热导率系数是衡量材料中热量传递速度的指标。