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21. | 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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22. | She is digging at ancient Chinese prose |
| 她在钻研古汉语散文。 |
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23. | He bestowed his life on science. |
| 他一生钻研科学。 |
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24. | You should get up the history |
| 你应该钻研一下历史。 |
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25. | He is digging into Chinese history. |
| 他正在钻研中国历史。 |
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26. | We addressed ourselves vigorously to this problem. |
| 我们奋力钻研这一问题。 |
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27. | He is digging at biology. |
| 他在钻研生物学。 |
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28. | Henry likes to have some tough problems to bite on. |
| 亨利喜欢钻研一些难题。 |
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29. | Jane could not recollect herself in church. |
| 简在教堂里不能潜心冥思。 |
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30. | To search deeply and laboriously: |
| 钻研深入刻苦地研究: |
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