average ratio的用法和樣例：
例句
- Is the weighted average of the ratio of the total amount of overdue loans over the total outstanding mortgage loans.
指過期按揭貸款總額占未償還按揭貸款總額的加權平均比率。 - In order to measure seasonal variation we typically use the ratio-to-moving average method.
為了度量季節變動，我們通常使用移動平均比率法。
