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| 31. | He is at grips with civil architecture. |
| 他在钻研民用建筑学。 |
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| 32. | He has been delving into Chinese folklore for many years |
| 多年来他一直在钻研中国民俗。 |
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| 33. | Henry likes to have some tough problems to bite on. |
| 亨利喜欢钻研一些难题。 |
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| 34. | spalling hammer |
| 碎石锤 |
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| 35. | You should get up the history |
| 你应该钻研一下历史。 |
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| 36. | The man up on robotics. |
| 这个人钻研机器人技术。 |
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| 37. | To search deeply and laboriously: |
| 钻研深入刻苦地研究： |
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| 38. | He has honestly studied history. |
| 他实实在在地钻研历史。 |
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| 39. | He is going in for marine biology |
| 他在钻研海洋生物学。 |
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| 40. | veneering hammer |
| 胶合锤 |
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