optimal ray最优射线optimaladj.最理想的；最佳的optimal extension field优化扩域optimal diagonal filter最佳对角滤波器optimal route selection最优路径选择optimal middle guidance最优中制导Optimal shortest-path最优路径optimal threshold value最佳阁值Optimal operating point最佳工作点optimal impulse control最优脉冲控制optimal deployment model配置机制optimal filtering fusion最优滤波融合

1. The amount was not balanceable among 20 hospitals.
   医院之间的用量非常不平衡，抗排异药的消耗量集中在器官移植的重点医院。
2. There is a lot of concern over the amount of herbicides and pesticides used in farming.
   人们对农业上灭草剂和杀虫剂的用量非常担忧。