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11. | burrow into a mystery |
| 探索神秘的事 |
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12. | burrow rock drill |
| 潜孔凿岩机 |
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13. | burrow a hole |
| 打地洞 |
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14. | Dig into a subject |
| 钻研一个题目 |
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15. | enquirying mind |
| 钻研精神 |
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16. | The student like to have difficult questions to bite on. |
| 这个学生老喜欢找难题钻研钻研。 |
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17. | Delve into |
| 调查,钻研 |
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18. | Delved into the court records. |
| 钻研法庭记录 |
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19. | delve into books |
| 钻研书本 |
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20. | take a dive into physics |
| 埋头钻研物理学 |
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