ore grade

例句：

1. 1. The company is looking for a more efficient way to process its ore.
   该公司正在寻找更高效地处理其矿石的方法。
2. 2. The ore grade in this area has been declining recently.
   这个地区的矿石品位最近一直在下降。
3. 3. The ore grade of the mine is crucial for its production efficiency.
   矿山的矿石品位对生产效率至关重要。