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| 自动请求重复 | |||
| automatic request repeat: 23 phrases in 10 subjects |
| Artificial intelligence | 1 |
| Aviation | 2 |
| Computer networks | 2 |
| Earth sciences | 1 |
| Electronics | 5 |
| Information technology | 2 |
| Multimedia | 1 |
| Space | 3 |
| Technology | 1 |
| Telecommunications | 5 |
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