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| 后备系统 | |||
| 支承系统 | |||
| 辅助系统 | |||
| 支持系统 | |||
| 备份系统; 备用系统 | |||
| 后备设施 | |||
| 后援系统 | |||
| backup system: 41 phrases in 14 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Automobiles | 3 |
| Aviation | 7 |
| Computer networks | 2 |
| Electronics | 8 |
| Information technology | 2 |
| Librarianship | 1 |
| Metallurgy | 1 |
| Securities | 1 |
| Space | 6 |
| Technology | 6 |
| United Nations | 1 |
| Wind Energy | 1 |
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