final rate的用法和樣例：
例句
- Pricing his bugs at about a tenth of the going rate for true Shandong crickets, he doubts anyone knows the difference, or cares.
他將自己的蟋蟀定價為純正山東蟋蟀市價的十分之一，但他懷疑是否有人知道或在意其中的區別。 - This paper develops an efficient method for pricing foreign currency options when the exchange rate returns have a heavy-tailed distribution.
摘要主要研究匯率回報呈厚尾分佈的外匯期權定價問題。
