Fast Arithmetic的用法和样例：
例句
- To reduce computation burden, a fast mode decision algorithem based on the statistics of the macroblock is proposed.
针对降低编码复杂度的问题，提出了一种基于统计特性的帧间模式选择快速算法。 - Three speediness arithmetic expressions for calculating the focused quantity is introduced to optimize the real-time performance of the system.
导出了计算聚焦量的三个快速算法公式，优化了系统的实时性能。
