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协作 制 : 32 phrases in 13 subjects |
| Advertising | 4 |
| Aviation | 1 |
| Business | 3 |
| China | 5 |
| Computer networks | 2 |
| Desert science | 1 |
| Ecology | 1 |
| Electronics | 2 |
| General | 2 |
| Name of organization | 2 |
| Technology | 2 |
| Textile industry | 5 |
| United Nations | 2 |
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