variable coefficient model的用法和樣例：
例句
- The utility of the response factor model is not restricted to these processes or by the specific forms of analysis performed.
響應係數模型的效用並不局限於這些過程，也不受進行分析的特定形式的限制。 - The non-adjacent grid conductivity model was used to calculate the flow transmissibility coefficient of fluid flow from the horizontal grid to the bedding grid.
採用非相鄰網格傳導係數模型計算從水平網格向順層網格間的流體流動傳導係數，實現流體流動的耦合。
