demand function的用法和样例：
例句
- Thus, the quadratic indirect utility function is less attractive because the uncompensated demand functions are non-linear in the parameters.
因此，二次间接效用函数是那么有吸引力，因为无偿需求函数非直线在参数。 - The elasticity of demand with respect to each variable and the contribution of each factor to .the quantity of energy demanded were calculated.
根据估计的能源需求函数，计算了能源需求量对各影响因素的需求弹性以及各因素变动对能源需求量的贡献率。
