pre-grinding

例句：

1. 1. Before the machine starts, we need to pre-grind the grains to ensure they're ready for processing.
   在机器开始之前，我们需要预先研磨谷物，确保它们准备好进行加工。
2. 2. The pre-grinding process is crucial for achieving optimal results in the final product.
   预研磨过程对于最终产品获得最佳结果至关重要。
3. 3. During the pre-grinding stage, the grains are mixed with water and then passed through a mill to create a finer texture.
   在预研磨阶段，谷物与水混合并通过磨机制成更细的质地。