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| 系统有效性 | |||
| 系统有效度 | |||
| 系统利用率 | |||
| 系统可用性 | |||
| 系统利用度 | |||
| system availability: 23 phrases in 11 subjects |
| Aviation | 2 |
| Business | 1 |
| Communications | 1 |
| Construction | 1 |
| Earth sciences | 2 |
| Economy | 3 |
| Electronics | 5 |
| Nautical | 1 |
| Space | 2 |
| Technology | 4 |
| Telecommunications | 1 |
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