yield of timbers removed before final cutting

例句：

1. 1. The farmers have a high yield of crops in the summer.
   农民们在夏天有高产。
2. 2. The company's yield has increased significantly since they started using new technology.
   自从公司开始使用新技术，产量已经显著增加。
3. 3. The yield of oil from this field is expected to be higher than last year's.
   这个油田的石油产量预计会比去年高。