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| 1. | Magma extravasated as pressure built under ground. |
| 当地底下的压力生成时，岩浆喷发。 |
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| 2. | Under ground |
| 今已作古 |
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| 3. | under ground economic |
| 地下经济 |
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| 4. | as well as an under-ground shopping center. |
| 还有一个地下购物中心，简直可以自成一个城市。 |
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| 5. | irrigation under ground membrane |
| 膜下灌溉 |
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| 6. | Gold is mined from deep under ground. |
| 黄金是在很深的地下采的。 |
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| 7. | lever under-ground weigh bridge |
| 杠杆式地中衡 |
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| 8. | They stayed under ground for two days. |
| 他们在地下呆了两天。 |
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| 9. | "built on, over, or under ground level" |
| 建于地面、上空或地底 |
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| 10. | The coal miners laboured under ground in uncomfortable conditions. |
| 那些煤矿工人在地下艰苦的条件下劳动。 |
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