statistic graphs造句

• In the first , an academic concept of the slope spectrum was firstly put forward . the slope spectrum is defined as a statistic graph or a mathematical model with its x - axis denoting the numerical value of the slope factors ( e . g . gradient , aspect or curvature etc . ) and its y - axis the corresponding area on the ground in a specific statistic area
  首先，本文提出了地面坡谱的理论概念：地面坡谱是指在一个特定的统计区域内，以某项坡面因子(坡度、坡向或曲率等)的大小为自变量，其对应的地面面积为因变量，构成的统计图表或模型。