cut-off grade of ore drawing

例句：

1. 1.The cut-off grade of the ore is crucial for the quality of the final product.
   矿石的截断等级对于最终产品的质量至关重要。
2. 2. The company has set a new cut-off grade for its iron ore products.
   该公司已经为其铁矿石产品设定了新的截断等级。
3. 3.The engineer carefully analyzed the data to determine the cut-off grade for the next batch of samples.
   工程师仔细分析了数据，以确定下一批样本的截断等级。