| 1 | The oil-bearing structure of the new oil field has been verified. | |
| 2 | Oil from these fields is priced in dollars. | |
| 3 | Lofty derricks dot the landscape in an oil field. | |
| 4 | Systems engineering has been widely applied in the oilfield exploitation and construction. | |
| 5 | It is building railways and bridges far from mines and oilfields, because it pays. |
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