sulphur-iron ratio

例句：

1. 1. The ratio of sulphur to iron in the ore is crucial for the process.
   矿石中硫与铁的比率对于该过程至关重要。
2. 2. The ratio of sulphur to iron in the ore is crucial for the process.
   矿石中硫与铁的比率对于该过程至关重要。
3. 3. The ratio of sulphur to iron in the ore is crucial for the process.
   矿石中硫与铁的比率对于该过程至关重要。