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| 41. | A rock-boring tool used in mining for sinking shafts. |
| 钻井机一种在采矿中用来挖掘矿井时在石头上打孔的工具 |
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| 42. | The limping（柔软的） shrimp（小虾） impulsively（有推动力地） implemented（工具、贯彻、执行） the compulsory（必须做、必修、被强制做、义务） duty |
| 柔软的小虾有推动力地执行被强制的义务。 |
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| 43. | bench excavation |
| 台阶式挖掘 |
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| 44. | sea-going dredge |
| 海洋挖掘船 |
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| 45. | Excavate an archaeological site. |
| 挖掘考古现场 |
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| 46. | braced excavation |
| 支撑式挖掘 |
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| 47. | belled excavation |
| 钟形挖掘 |
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| 48. | continuous bucket dredge |
| 多斗挖掘船 |
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| 49. | complete set of hydraulic excavator |
| 水力挖掘机组 |
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| 50. | dredge stripping |
| 挖掘船剥离 |
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