oral replacement的用法和樣例：
例句
- Growth of the central leader is maintained weak by annual replacement pruning.
利用年年更新修剪的方法來削弱中央領導乾的生長。 - Then Monte Carlo simulation was employed to search for the optimal improved replacement time and overhauling periods, and method to solve the model was also provided.
在此基礎上，使用蒙特卡羅模擬方法求解最佳更新時機和新舊設備的最優大修周期，並給出模型求解的方法。
