| 1. | The ore minerals are bounded by the vein walls .
矿石矿物局限于矿脉之内。 |
| 2. | Coal seams intermixed with iron ore .
煤层和铁矿混杂在一起。 |
| 3. | Gignatic machines load ore onto long trains .
巨型机器将矿砂送进长列的火车中。 |
| 4. | The net profit amounts to 20 dollars per ton of ore .
每吨矿砂的净利达20美元。 |
| 5. | The ore assays high in silver .
这种矿石验明含银量很高。 |
| 6. | Single deposits contain millions of tons of ore .
单个矿床的矿石储量达数百万吨。 |
| 7. | To smelt iron ore in a blast furnace can obtain iron .
在高炉中熔炼铁矿石，可取得铁。 |
| 8. | The average daily throughput was 1, 370 tons of ore .
日平均产量为一千三百七十吨矿砂。 |
| 9. | Ores are also being obtained in quantity from other countries .
矿石也从国外大量输入。 |
| 10. | Many years ago men first heated iron ore in a fire .
许多年前，人们初次在火中锻烧矿石。 |
