ore loss ratio

例句：

1. 1.The mine's ore loss ratio is a key indicator of its productivity.
   矿场的矿石损失率是其生产力的关键指标。
2. 2. The company has been working to reduce its ore loss ratio.
   该公司一直在努力降低其矿石损失率。
3. 3.The mining industry is facing increasing pressure to improve its ore loss ratio.
   矿业正面临着提高矿石损失率的压力。