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| 异地成煤说; 漂移学说; 漂流理论 | |||
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drift theory : 10 phrases in 7 subjects |
| Agriculture | 1 |
| Desert science | 1 |
| Engineering geology | 1 |
| Genetics | 1 |
| Life sciences | 1 |
| Oil / petroleum | 1 |
| Technology | 4 |
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