| |||
| 备用系统; 备份系统; 应急系统; 后备系统; 等待系统 | |||
|
stand-by system : 17 phrases in 8 subjects |
| Aviation | 1 |
| Business | 1 |
| Electronics | 2 |
| Metallurgy | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 1 |
| Technology | 7 |
| United Nations | 3 |
| |||
| 备用系统; 备份系统; 应急系统; 后备系统; 等待系统 | |||
|
stand-by system : 17 phrases in 8 subjects |
| Aviation | 1 |
| Business | 1 |
| Electronics | 2 |
| Metallurgy | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 1 |
| Technology | 7 |
| United Nations | 3 |