mean yield

例句：

1. 1. The farmers are hoping for a good mean yield from the new irrigation system.
   农民们希望新的灌溉系统能带来好的平均产量。
2. 2.The company's mean yield has increased by 5% since last year.
   该公司的平均产量自去年以来增加了5%。
3. 3. The economist predicts that the mean yield of corn will increase due to improved farming techniques.
   经济学家预测，由于改进的农业技术，玉米的平均产量将增加。