oral replacement的用法和样例：
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来削弱中央领导干的生长。 - 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.
在此基础上，使用蒙特卡罗模拟方法求解最佳更新时机和新旧设备的最优大修周期，并给出模型求解的方法。
