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- Miners had to dig deeper to extract coal, which became uneconomical. 为了提高产量，矿工不得不向更深处挖掘，这变得越来越不合算。
- Extractive coal industry has not its own disclosure norm of accounting information, only adheres to the common disclosure standards. 煤炭采掘业没有本行业的会计信息披露规范,只能遵循共同的披露规则。
- Miners are finished extracting coal here, and the sides of the tunnel have been sprayed with quicklime to suppress explosive coal dust. 矿工们已经完成了这里的煤炭开采，坑道两壁都喷上了生石灰以防止煤尘爆炸。
- Design of the Hydraulic System of Extract Coal Filter Press 压滤机液压系统设计
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- She piled on more coal before the fire go out. 在火熄灭之前她又加上些煤。
- I add the coal on the flame continuously. 我不断朝火里添加煤炭。
- They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- Such an extract in a solution of alcohol. 酒精提取物酒精溶液中的提取物
- He tried to extract his pole from the mud. 他试图用力将杆子从泥中拔出来。
- Oxidation products of four raw coals and five extracted coals using hydrogen peroxide under mild conditions have been fractionated by solvent extraction and analyzed with GC/MS. 本论文用溶剂萃取法对四种原煤及其氧化产物和五种萃余煤及其氧化产物进行了族组分分离并用GC/MS对各族组分进行分析。
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
- That coal mine is no longer worked. 那个煤矿已经不经营了。
- We have enough coal to see the winter out. 我们有足够的煤过冬。
- They eked out their coal by collecting firewood. 他们拣拾木柴以补充煤的不足。
- We had a big delivery of coal today. 今天我们收到大批订购的煤。
- They extract ten million tons of coal each year from underwater mines. 他们每年从水下煤矿中采掘一千万吨煤。
- Pile on more coal the fire is going out. 火快灭了，再加上些煤。
- What can we do with the bituminous coal? 这些烟煤可以用来做什么？
