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| 海底 | |||
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sea bottom : 53 phrases in 15 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Bridge construction | 1 |
| Earth sciences | 2 |
| Engineering geology | 4 |
| Fishery fishing industry | 1 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Navigation | 1 |
| Oil / petroleum | 6 |
| Space | 1 |
| Technology | 29 |
| United Nations | 1 |
| Wushu | 2 |
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