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| go to the bottom | |||
| go deeply into get into the bottom of a matter | |||
| 深究: 44 phrases in 15 subjects |
| Aviation | 1 |
| Business | 1 |
| China | 8 |
| Commerce | 2 |
| Consulting | 1 |
| Earth sciences | 11 |
| Electronics | 1 |
| General | 6 |
| Geology | 1 |
| Navigation | 2 |
| Oil / petroleum | 1 |
| Project management | 1 |
| Space | 2 |
| Technology | 5 |
| United Nations | 1 |
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