| 21. | allocate coal on a priority basis. |
| 按轻重缓分配媒。
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| 22. | Children of eleven and twelve years of age were employed underground in coal mines. |
| 十一二岁的儿童被偷偷地雇用在煤矿里干活。
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| 23. | The coal market is very excited. |
| 煤炭市场很活跃。
|
| 24. | We buy coal from a coal merchant. |
| 我们从煤商那里买煤。
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| 25. | a coal [copper, diamond ,gold ,lead, placer ,salt ,silver ]mine. |
| 煤［铜，钻石、金、铅，砂，盐，银］矿。
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| 26. | an opencut coal mine. |
| 露天煤矿。
|
| 27. | dig out minerals such as coal ,copper ,diamonds, etc. |
| 挖掘煤、铜、钻石等矿物。
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| 28. | Coal is not a true mineral ,diamond is. |
| 煤不是真正的无机物,而金刚石则是.
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| 29. | Will this coal last out the winter? |
| 这点煤够烧一个冬天吗？
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| 30. | There has lately been a rapid increase in coal production. |
| 煤产量近来有迅速的增长。
|