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| trial subscriber | |||
| 试用用户: 32 phrases in 12 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Earth sciences | 1 |
| Economy | 1 |
| Electronics | 13 |
| Information technology | 4 |
| Mechanics | 1 |
| Military | 1 |
| Nautical | 1 |
| Project management | 1 |
| Space | 2 |
| Telecommunications | 4 |
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