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调节期 : 30 phrases in 10 subjects |
| Agriculture | 5 |
| Automobiles | 1 |
| Business | 2 |
| Economy | 1 |
| Electronics | 1 |
| Finances | 2 |
| Genetics | 7 |
| Hydroelectric power stations | 2 |
| Securities | 1 |
| Technology | 8 |
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