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物理源 : 19 phrases in 9 subjects |
| Chemistry | 1 |
| Earth sciences | 5 |
| Electronics | 1 |
| Fish farming pisciculture | 1 |
| Genetics | 2 |
| Geology | 1 |
| Name of organization | 5 |
| Space | 2 |
| United Nations | 1 |
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