proportionality factor的用法和樣例：
例句
- The scaling factor must be an integer for fixed-size elements.
固定大小元素的比例因子必須為整數。 - The vertical scaling factor is an important parameter in the application of fractal interpolation method, which meanly decides the accuracy of the interpolation.
在分形插值方法中，垂直比例因子是影響插值精度的主要因素。
