function description的用法和樣例：
例句
- The state-space representation and the transfer function representation of fractional order linear time-invariant systems are introduced.
摘要介紹了分數階線性定常系統的狀態方程描述和傳遞函數描述。 - The wetting front moved nearly parallel to the soil surface, and its length could be described by a power function of time, when the distribution of initial soil water was uniform.
當初始含水量分佈均勻時，降雨入滲過程中濕潤鋒面幾乎平行坡面運移，濕潤鋒深度與時間的關係可用冪函數描述。
