crop-planting machine

例句：

1. 1.The farmer used a crop-planting machine to plant the seeds in the field.
   农民使用一种作物种植机在田间播种。
2. 2. The new crop-planting machine has greatly improved the efficiency of planting.
   新型的作物种植机大大提高了种植的效率。
3. 3. The farmers are using this crop-planting machine to plant their crops in the spring.
   农民们正在使用这种作物种植机在春天种植他们的庄稼。