pulled behind combine

例句：

1. 1. The farmer used a combine to cut the grass and then mowed it down.
   农民使用联合收割机来割草并把它修剪整齐。
2. 2. The combine was heavy and difficult to maneuver, but it did the job efficiently.
   联合收割机很重且难以操控，但它却能高效地完成工作。
3. 3. The combine harvester is an essential tool for farmers in the field.
   联合收割机是农场主田间作业中不可或缺的工具。