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主 动 压力 : 26 phrases in 9 subjects |
| Aviation | 1 |
| Bridge construction | 1 |
| Engineering geology | 4 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Household appliances | 1 |
| Hydroelectric power stations | 4 |
| Soil science | 1 |
| Sports | 1 |
| Technology | 12 |
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