outer variable的用法和樣例：
例句
- Audit risk modeling converts audit risk that is disordered and exogenous into an endogenesis variable that can be controlled by auditors.
摘要審計風險模型化將外生的零散化的審計風險轉化為易為審計師控制的內生變數，通過對內生變數的控制實現外生變數的目標。 - The supply of basic currency is a acrogenic variable controlled by the authorities in our country, so the supply capacity is determined by estimating money multiplier.
我國基礎貨幣的供給量基本上是由貨幣當局控制的外生變數，貨幣供給量是否達到預期目標關鍵在於估計貨幣乘數的大小。
