final rate的用法和样例：
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.
他将自己的蟋蟀定价为纯正山东蟋蟀市价的十分之一，但他怀疑是否有人知道或在意其中的区别。 - This paper develops an efficient method for pricing foreign currency options when the exchange rate returns have a heavy-tailed distribution.
摘要主要研究汇率回报呈厚尾分布的外汇期权定价问题。
